Not sure if this is the right place for this but here are some things I have noticed.
I believe the aiming widget needs a little more contrast as it disappears completely against certain backgrounds, I just don't fight zombies in melee on white concrete or sand anymore because I'm guessing where I'm aiming and I miss far more than I do on other surfaces. It's not so bad with firearms as the coloured outline is still visible even though the widget is not.
I managed to permanently jam a JS-2000 shotgun, it jammed with no rounds in it. I can rack it as much as I like but it wont clear, I can't load it, or do anything with it.
Magazine spawn rate seems to be an issue. On one character I had seven MSR788 Rifles and five MSR700 Rifles sitting on the floor of my Fortified Trailer which I had gathered from three locations without a single magazine between them. I still have not fired a MSR788 or a MSR700 as I have never found one with a magazine. I have had at least ten characters in the Beta so far and I mush have looted dozens of these rifle across them all.
I would love if there was an option to manually do everything with firearms like in the older build. I had gotten very used to manually racking shotguns between shots and I prefer that to having it done for me.
If i start reloading a firearm while standing still it will sometimes let me start walking and sometimes it won't, so I have to hit the jog button to cancel the reload animation. But I can reload and walk just fine if I'm already walking when I start.
I get absolutely soaked in blood when fighting with firearms, even if I'm firing from a decent range where I wouldn't expect that much splatter to get on me.
Rain seems to cause framerate issues or stuttering. This seems worse when fighting zombies with firearms, continually firing with large numbers of zombies on screen and nearby. I suspect this is how I ended up permanently jamming the shotgun, perhaps the jam was supposed to happen before my last shot but due to the stuttering and general laggyness it happened after the weapon was empty. Fighting with firearms without rain gets a little stuttery, but no where near as bad as with it.
Driving in the rain is almost impossible due to bad framerate and stuttering, this seems much worse when turning than when driving in a straight line.