Option 3 seems totally unrelated to the others, which are concerned with the number of Reinforcement-like abilities. I can love Reinforcements but also think it's good to have reasons to think twice about using them.

I don't use them a ton, and I don't have a very strong opinion one way or another. (This post ended up being kinda long, so the important stuff is at the end in bold)

For one thing, I have never been a fan of ubiquitous Lobot. The versatility he provides is so good and so cheap that it can be blandly inserted into most squads without much thought. Sure, sometimes you're better off without him. But still, I'd prefer that super-effective flexibility be a feature limited to some squads than a stock option for everybody. (That said, I don't mean to hate on Lobot or Reinforcements or anything - just thinking out loud).

I am a massive fan of Reinforcements on characters that specifically boost their Reinforcements (Valenthyne is the ony one I can think of off the top of my head). I like Bribery only when the ability granted is useful (i.e. I love Marn's Bribery; Disra's is very underwhelming). I also like Bribery because so far it's only been 10 points; that feels like the right kind of flexibility that should be able to fit in almost anywhere.

In general, I guess I like faction-specific Reinforcements - I like having the option of bringing in a solid 19-20 or 28-30 point attacker instead of a bunch of random tech pieces. Even if you end up bringing in Faction tech where you would have brought Fringe tech, it feels a lot cooler. You feel way more awesome bringing in 5 Mando Demolitionists with Jaster than you do bringing in 6 Ugnaughts with Lobot.

Going back to Valenthyne, I think he's designed really well because he's a lot cheaper than you'd expect. In general, a Reinforcements piece seems to get its cost by "How much is the piece itself otherwise worth?" + "How many points of Reinforcements do you get?" Bigger Reinforcements pieces get hit harder because they often just aren't worth the risk. Jaster is a great piece, and I think fairly costed in theory - without Reinforcements, he's a nice 24-point piece. But he's absurdly fragile for 54 points, and Reinforcements or not he's just not worth risking in a fight.

I'd love to see more Reinforcement pieces that are faction specific, and/or not useless for other things. Pieces like Valenthyne that get costed lower than normal because they are such a score liability.