Alright, I played this a bit and well, lot's of things I have an issue with.
For one, why is there no true concealment already included? It makes gameplay so much better, especially when you are heavily outnumbered and have to get as close to objective as possible before starting to blow things up. And what kind of sense does it make for Advent to start self-destruct of their own equipment the second you step out in the street and not a moment before while you were hiding there for a week? At least in the base game it could be said that they spotted the incoming dropship, but now...
Other things I'm missing from the first LW - commander's choice (hope the mod problems get fixed), aiming angles (someone in charge did't like it, so it's gone - why not move it to options like NCE and Red fog are?). No true training roulette either, that was an awesome option in the first game.
But the biggest issue that I have are secondary weapon choices for some classes. Sniper - you get to mark the bad guy instead of, you know, just killing them right away. Wow, hold me down. Gunner get's a knife. What a hell for? And technical - a glove that is a combination rocket launcher and a flamethrower. Could they have possibly come up with a stupider design? Ugh.