I played the first version of this game and I really like the improvements! Playing the first game you could kinda tell that there was more you were wanting to do, but it just didn't seem like you quite knew how. I've been loving the new stuff so far, I love the wall bugs!
I had some trouble hearing the suit AI, so I would say you should try to get that boosted a bit?
I had no trouble with the save system, by the way nice addition! That was something I kinda had trouble with in the first version, mostly cause I suck at combat in shooters sometimes. But that just meant I got to try the save system a lot!
Combat was pretty fun, but I kept dying! My own fault, I got startled and sprayed ammo. I had fun though and kept going several times.
I like the little bits of story that you sprinkled in; I could see that in the first one that you were wanting to tell more of a story and I walked away from my play-through with a much clearer idea of what that was. It still needs more to it, but I was having fun. I like the food dispenser thingy and the wall robo-bug things, really all the new things you added.