i was quite pleased to find the combat system changed in the recent version. although aliens could work cooperatively (instead of now), the alien run at your position at the start of the fight is finally over. the lurking of aliens therefore is not possible anymore too. unfortunately the aliens still know whom of my guys is wounded most, even if he/she got the wounds from an earlier fight
all those things that i really like much
the bad thing about that change is the chance of late-fight-deaths of soldiers in missions with more than ~15 opponents. i tried to do an alien base run with my best team (about 50-60 combats, weap skills somewhere between 70 and 90, quite much health and so on). well, one base run.... more like 20 at same base. the best i could master so far was 16 kills, i saw at least 2 others, and for the time it took it felt like there were another 5-10. unfortunally that was when my computer froze. cant tell why but i dont think it was UfoAI. on every other try i never crossed 10 kills without own losses.
what i want to say about it:
either the complexity of the alien base is too big (no more than 5 guys per team possible / 2,5 teams though)
or the amount of enemies is too high
or the aliens aim too well
also some rooms have obstacles that force you to split-up, esp. those rooms with large fuel tanks, and crossing that room you'd have to turn to 2 sides. may be i did the base in a bad situation. the aliens already are on the latest tech level while i am not yet. Still it hurts.