These are going to be in order of pertinence. Although, there's nothing truly game breaking and the demo is solid for a early beta.
Clipping and barriers - there's parts on the ship where you can jump and phase your head through. As well as there's a barrier that stops you from jumping off but it's not 100% secure. Also there was a point where a buoy enemy fell through the floor and shot me from under the map.
Enemies - although I was playing only with 2 people holy mother of GOD there's a lot of enemies. I'm unsure if you can die in this version but if you can the health pool is way too high for your ship. We were sitting there killing ads for like 5 minutes straight (unable to kill them faster than they spawned) and still didn't explode.
Particles - specifically the dust particles kicked up from your ship make it near impossible to see when doing certain maneuvers. My pilot was reversing and I was trying to shoot backwards and had to aim off the red croshair to get any type of hits
Optimization and options - it's beta I expect this. But just gotta put it in here that it needs a little more optimization. Options were actually really good but my main gripe is a full-screen mode
Menus - I thought I had soft locked the game after opening a menu with (E). Doesn't seem intuitive to press (E) again to get out of it. Maybe still keep (E) but add (ESC) as well.
Reloading - adding a reload button to preemptively replenish your weapons so you don't have to sit there and spam the rest of the weapon out to get it replenished.
UI - I'm not sure exactly what yet but the UI seems off. Maybe because it's too Stagnant, or that there's not a lot on it. But it seems off somehow
To the good stuff - the UI for the steering is amazing. Always know where you're going and how fast. The weapons feel good and satisfying, maybe a bit of tweaking in audio to really give it that umph that they need but design and feel were great.
Going to try it with a more full crew next but here and now it's got an amazing baseline for where it's going.