I've never used a crossbow build and have only a little experience in the game, but here's my thoughts:
Stat distribution is fine, and the skills you've chosen all work well, but it'd be nice if you could include some points in traps as well. Being able to spot traps is useful, being able to disarm them is free exp, and being able to lay them yourself is excellent. Bear traps are cheap to make and incredible at blocking enemies from getting in close, and make an excellent combination with stealth. Sneak in, lay a bunch of bear traps to funnel enemies or block them off entirely, and presto.
Feats are good, as for the additional feats you were thinking of, nimble is good even with heavier armor, opportunist should be one of your core skills considering that you'll be using electrical bolts and knee shot (plus you can combine it with traps), ninja looter and burglar don't seem to have that much utility as pickpocketing/stealing from civilized peeps is not going to be a main source of income or loot. Power management is more for people going full tech (energy weapons/shields/cloaking devices), Snipe's pretty mediocre and doesn't compare to the crit bonuses you can get, expertise probably won't pay off much as the added damage is per hit and you'll be firing a few big shots rather than lots of little ones, uncanny dodge seems more like something you stack with the dodge skill? I don't think it's gonna be huge anyway. Disassemble is mediocre unless you want to recover weapon mods from weapons you craft/find rather than buy them (not worth a feat though), sure step is mediocre, skinner and clothier could be huge if you plan on making a lot of leather armor and cloth items (this includes tabi and balaclavas both of which are rather nice)
As to your specific questions
-Probably not. A good end to a quest that doesn't give you much extra is not worth a feat, neither is bandage healing as you can't do it in combat and healing hypos are not THAT rare.
-No idea, but you might be able to get away with 0 if you don't mind missing occasionally. I have 0 points in throwing and still use molotovs/grenades/caltrops. Just have to not rely on them.
-No idea, but you might want to get 10-15 points for crafting a certain kind of leather you'll find later on (it's not huge but still nice). Chemistry also allows you to craft grenades, apply poision to traps/caltrops, and will allow you to make fire arrows+molotovs, so it might be worth thinking about it.
-If you hate missing out on quest stuff or being unable to go in certain directions in quests, get persuade.
-Disassemble isn't really worth it, no.
-Some crafting feats are fantastic, and others can be kind of mediocre. Power management seems like one of those things to get if you're going HARD electronics use, like energy weapons and everything.
-No idea, I've never bothered with dodge or evade
Hope some of my rambling helps.