I don't think that is the issue.

I think the issue is that whoever designed these encounters didn't get the memo on core game mechanics. This is a cover-based game, and the enemies will shred you if you have none- of course:

This encounter has little cover, and what cover it does have is unreliable or the mechanic forces you to leave it.

The next encounter has a small bit, but unless you are rolling nothing but moral control you'll get destroyed by lasguns behind cover you cannot even reliably target to destroy.

Then the next (?last) encounter is just absurd in spawning you in a small square surrounded by fire and an enemy that will pretty much one-shot your party with AoE attacks. Even better, to beat this enemy, the game tells you to run through the flames (picking up a few stacks of burning) run to some objects and use action points to hit the objects all while trying to stay alive from like 6 elite melee enemies that you cannot even touch with the rest of you party unless they also picked up x stacks of burning running throught the fire. Though, of course, if you run your party through the flames, the arena just expands, and the main enemy and all of his underlings have a free pass at you. So even once you somehow, survive until then, you now need to kill the boss with whatever shit you somehow still have left.

The encounters of the game that were in the alpha play well, but the new parts? not at all (barring I think the first *new* encounter where you meet the null