AP change of Sneak: the old sneak talent was an all or nothing anyway. Because either the combo with guerilla is interesting, either it isn't. And if it's effective on scoundrel, it will be more on marksmen. So ineffective is the way to go I guess, and sneak would allow you to rest in combat more effectively. Marksmen could have a 5 AP attack, so 3 AP minimum for sneak as you said is a good value. I agree with that suggestion.

Glass canon: I just feel this talent is too much. Just restrict the AP gained (1 or 2 instead of 4) and change the vitality nerf accordingly.

Talent trading and All skilled up: Sounds good.

Escapist: I never flew from combat. No idea. I'm used to reload. I'm planning todo honor mode, and I'll have to take that talent on both main probably, but I see that as one supplemental penalty compared to Tactician mode (one talent less).

Courageous: No. Just die.

My precious: Instead of repairing less than half the time (because you replace gear), you never repair (and repair is free anyway). Well doesn't sound OP at all, so it's fine. As additional effect you could say it has an effect on the gear you sell: the gear you sell has 10% more value because you make it shine.