Thanks for getting aroudn to playing it. I really appreciate all of the points you raised. I'm glad there was stuff that you liked.
There is definitely a polish issue in many of these cases, simply because of how much there is to do. Things like balance tweaking, and that pesky input buffer (which works fine in many cases, but as you pointed out, shooting after a reload is really weird). I'll be taking your feedback and addressing them. I really appreciate it.
Regarding the shotgunning enemies and some of the level design, I totally agree with you. The level is around what I'd like the game to play with, but AI is super rudimentary, and is one of the next features I'm going to be reworking. Your frustrations are valid, and they're not behaving how I want them to. So stay tuned and I hope you'll enjoy it again once I've sorted them out.
But thanks for all of your points. Much love!