What else should i add... maybe feat upgrades? Yes, and i'll call it "specializations". However, feats are already good. fuck, what should i do? Ooh, i've got an idea, what about nerfing them first?!
inception trailer sound
Quick tinkering - Cooldown changed to 5 turns (up from 2), setting traps while in combat will now cost 25 action points
Some of the specs are great though. You take commando spec and now you can burst three times in a round with a chimera/huszar as long as you use adrenaline and kill something. Before Expedition only marauder/hornet could do that. I'm extremely happy that all four assault rifles are usable now (I mean marauder/huszar still kinda suck but whatever). That alone is enough to make specs totally worthwhile for me.
Better yet, you can burst three times every turn without using adrenaline, if you craft a 7.6mm hornet with a rapid reloader. Well, provided the first burst kills a target. Also, with a Bullet Strap Belt, you'll still have the AP to reload at the end of your turn.
Anyways, there's a lot of really powerful specs. Concentrated Fire will more than double the damage of a 7/9 shot burst, if all rounds hit and the feat is fully specc'd. Get ready for 600 damage non-crits at the end of a burst. Flurry spec nearly doubles the number of flurries you can attempt in a turn (7 vs 4 w/ 70 AP or 5 vs 3 w/ 50 AP once you've got max stacks). Etc.
Spoiler alert.
AR builds are probably the most powerful builds after Psi builds.
Burst = Rapidly fires five bullets with reduced precision. Full-auto (lvl6) adds 2 more rounds to a Burst. Just think about it: 7 bullets for the cost of 3.
Chimera 9mm + Rapid Reloader = 13 AP per shot
Adrenaline + Temporal Contraction = 92 AP for first 3 rounds
Suppressive Fire (lvl1) + Full-Auto (lvl6) + Concentrated Fire(lvl10) + Commando (lvl14) = profit
The build is basically done at lvl 14. You are basically unstoppable (Tchort included). Everything else is just topping.
The only downside is that you have to carry a shit ton of ammo.
Pistol/SMG builds can be as powerful as AR builds because they profit from AP reduction at high DEX. Also pistols have their own version of Burst (3 bullets instead of 5).
Theoretically Snipers should be the superior choice and they are doing more damage per shot but that means that Snipers are basically wasting more damage with fewer shots.
Unfortunately these builds feel like shit because Underrail is throwing hordes of enemies at you and that means mobility and more attacks are more important than apex damage per shot.
The real question is: Are shotguns more efficient than ARs or not?