great question, and a recurrent one.
its great to see this instance, folks are talking more about the thing-itself
and there's less ad homs at the design team -
in the past, on this issue I've been less than stellar, and personally made the mistake
of ad homs, so hehehe

I digress -
boardwide CEs oughta be costed moreso than others...
if they're a negative effect boardwide, like Nute Gunray...
then they can hamper a squad, so oughta make costs lower.
boardwide negs are rare.
If they're a very beneficial CE (+4/+4 or twin, sometimes both boardwide)
they also need to be costed appropriately.
GGDAC is undercosted by maybe 20pts, by CE combos alone.
Im a separatist player through and through - but thats true, and prior to Poggle reform,
CIS was ridiculously the 'space marines' faction of SWMinis -
they were the default, not cause folks liked em,
but because they had the better combos.
Mouse Droids and Mas Amedda were key in shifting the meta that way...
yet,
if CEs and SAs force miniatures into a bottleneck,
it makes a vulnerability that balances out the potential gimmick or awesome meta combo.
8 figures clumped in a room?
grenades 40 or missiles 40/60, a splash turret or force power will wipe them out. all of them

Boardwide tend to be beneficial,
and undercosted relative to what meta-combos could form,
so recosting those via errata could be a way to make CEs more meaningful,
while keeping that "must be in 6 squares" constraint.
As harsh as I am about MouseDroids,
they are fragile to direct-damage and AoE,
and i tend to lose my mousies really early in matches.
speed 4 them, limited programming so they can't increase defence or gain evade somehow,
5pts base cost, +x, where X is 15pts per CE you want to relay through it...
and they're fixed.

now, there'll be 1 mouse droid per squad,
and it will be this fragile unit, so folks will take instead more lore-friendly
Astromech droids and whatnot.
Aves is just a nice piece,
disruptive or suppressive, but not both on the one piece.
it covers some loopholes,
and games with Aves as an opponent,
have been generally fun.
Usually, there are ysalamiri too, but I don't find them as broken as
a whole faction of force immune what the's? that can use armor and direct damage...
and sometimes, droids.
Vong squads oughta not have droids, as a epoch rule or something,
except for Rhommamool and Osarian hehe.
Vong squad with Zann-consortium DD that I can't have in a separatist squad?! that is insult to injury,
with salt in the wound even.

A lot of CIS players will hate me for this, hehe,
but, boardwide CEs are a dual-edged sword,
and moreoften than not, the CIS gets some ridiculous meta-combos from CEs being board wide.
anything that makes more strategy,
rather than a turn-burning wait to whittle away with opportunist or superstealth,
is going to be awesome for CIS.
Lancer squads were one thing,
but I still like having a battalion of droids march in and blast at +4atk for twin maybe 40dmg per unit.
there's something awesome about
not having enough dice to roll,
and absolutely blasting the crud out of a CT emplacement or that
one jedi who defeated your jedi.
rolling 30 or 40 dice in a battledroid swarm is fun,
and of that, maybe 15 hit, 3 crits,
and you remove only 2 or 3 enemies.
they roll 8 or 9 die,
but of those, 4 or 5 hit,
and they remove 3-5 enemies,
games come close to the wire then.