Good question, Jim.

Part of it has to do with the range of Grenades...she has to get within 6, and so she has to at least make herself somewhat vulnerable if she wants to use RD. Since she's a fragile piece, this makes a difference. But if she can shoot from 12+ squares away with the same effect (no saves to avoid damage) then that's a significant threat.

The other part is that (in a Talon or Jabba squad) Mira's 60dmg is coming at a +18 Attack with a fprr if needed. She's not usually going to miss those attacks. Someone might respond, "Okay, but Boba AFH in a Talon/Jabba squad does 90dmg at +20 Attack, so it's not too far off base" ...but you can still Evade/Soresu/Deflect and Armor those shots (and he costs 50, not 28). With Mira the damage just sticks, and there's nothing you can do about it.

This has significantly affected my tactics and positioning in many games. In fact, depending on the map, my first target (even before Talon or Boba) has been Mira...partially because she's rather squishy, but also because my pieces are usually utterly helpless against her for as long as she's on the board.

If you want a specific example, I can point to our finals match at FrostyCon several years ago: I was playing Super-Stealth ERCs, and you (Jim) were playing Talon and Mira. Mira single-handedly destroyed my squad: not only did her Force Sense negate my SS, but doing unavoidable 60dmg meant that my Shields 2 was irrelevant. She only needed to roll 2s to kill a new ERC every round. If I at least could've kept my Shields saves, I might've been able to mount something of a counter-attack, but with RD as it was, there was literally nothing I could do. I remember your play report for that game saying this was the slowest game you had played all day, and RD was precisely the reason for that.

I'm sure there are other examples to share if I needed to, but this is the first one to come to mind.

Another more recent example for you Jim, Tint and I played in the top six at vasselcon just a couple weeks ago. I was running VOL and 100pt. palps. He was running mandos with Mira. Mira let him totally get around Vaders Shien and armor saves which would have only needed 9 to avoid her damage and with being able to use palpys plethora of FP for rerolls I think Vader stays alive a lot longer than he did which wasnt very long largely due to RD. If RD had been changed before that game I would have at least based as many other of his characters with vader to make him shoot at him instead of throwing grenades so as not to damage his own characters. It does make a difference in some matchups for sure. As far as not clustering pieces in green squares as pointed out by Jenerai, the map we were playing on has virtually no squares in the gambit zone not bordered by green so he was able to negate Shien on Vader and palpatines evade with Mira. bigtime ouch.

I have run that squad in multiple tournaments and made the playoff cut at least a few times with it so not inexperince with the squad. We were playing on outlaw city which has literally no squares in the gambit zone not bordered by green. Miras high attack means she didn't miss Vader often. Believe me, it had a definite effect on the game to say otherwise is foolishness. I am sure Tint would agree if he feels like weighing in.

gholli69 taking Vader-Emp to the final table in the Championship speaks for itself.
He's already proven that he knows what he's talking about and not just talking a bunch of malarkey.

People have been saying Rigged Detonators on attacks is broken for years.
I have seen Mira OTK a full 100hp Jaina Solo Fel, Jedi Master w/ MotF2 & Lightsaber Deflect.
Mira needed 2s to do 80 but she Crit on an attack to do 100 auto-damage instead.
One turn kill a 32pt Jaina tank . . . ridiculous.

Mira 20 damage base +10 damage Jabba CE +10 damage Death Strike = +18atk for 40/40

To be fair, to kill Jaina she needed the crit. That was lucky, just like Mace or Boba BH. However, to your larger point, needing 2s to do 80 unpreventable IS ridiculous.

Thanks to everyone for posting their stories. I felt blindsided before this although I agree with the change in definition and in fact lobbied for that exact change. I guess my ear to the community isn't what it once was, and I guess a good reason why I no longer serve on the committee.

The issue Jen isn't that she hits and does damage. It is that the damage is likely to stick due to auto failing saves against regular attacks that can and often do have big damage boosts included. I understand that you don't like the way it affects Zam. However just because you don't like something doesn't mean there isn't a balance issue with Mira. At this point you have been Givin multiple examples of how she is abusive and your only response is Play better or pick a different squad? Personally, I don't know too many players if any who are better squad pilots than TINT and he is the one who started the discussion formally. Additionally, if any one piece is causing people to "play something else" in response to it, then it is probably an issue just like dalaa was. I don't think Mira is nearly on the level of dalaa, but she is warping the meta to a certain extent and I feel like the change made by the balance commitee in this instance should help curtail that.

And all that is fine. If she meds changed, change her. I don't agree that she needs changed. I think design team can easily fix her issue.
However, whatever, let's go with she is warping the meta.

Change her, without affecting Zam.

The change should have been to her cost or something else. Again my suggestion was to make her base 10 damage.
I think That would have solved the issue everyone is having without affecting Zam.

Mira was fine and we didn't want to make a change to her.
We like her power level and how she requires opponents to learn to improve their game.
However, on many of our best maps, it's impossible to avoid Rigged Detonators.
The consensus of the Balance Committee and the community was that Rigged Detonators needed to change.
It was too much essentially guaranteed auto-damage than was good for game balance.

We all have nostalgic feelings towards certain characters in the game and it's easy to feel upset over changes that might affect them. However, Zam is still doing auto-damage Missiles 30 across the board. Some enemies might Beskar'gam that down to 20dam but most are going to take the full 30. She is still getting movement breaking to Double with the same high attack for the same damage. Enemies won't fear low cover as much but they might still fail their saves.
I don't think this change has much impact on her or Mira, it just means less of their damage is auto-damage.
Which will be more balancing for the game overall.

Concern trolling isn’t cool B.