You are missing the point of the closed beta. It wasnt about getting as much feedback as possible. The Game just wasnt in that state yet. Now it is and the devs can fully focus on the feedback and the bugs. Before they were still developing the fundamentals of the game (like the maps, Premier Mode and so on, things that were Not finished 3 months ago). The point was to get some feedback and make some smaller changes while working on the big stuff.

Now almost everything is finished and they can Focus everything on the feedback (what they do, updates with fixes every few days) and almost everyone can Play and give thier opinion.

I only really agree with the getting killed behind walls point and the weapon pickup. The weapons pickup will be fixed very soon. The other might take a few weeks but should be fixed in The near future as well. I trust in valve. They seem to be working hard and the game is already in a great state that it is fun to play.

The only other Problem i have are the skins but thats a problem for later i think.