6) THE HOTBAR IS TOO SMALL
Not a fan of hotbar at all but I'd rather have a biggere hotbar well organized than having to waste my time to configure and navigate through multiple ones.
In my opinion the hotbar could be bigger so we have 4 - 6 more squares.
Yes yes and yes again, I have a 21:9 screen and look at how much of the screen is wasted :
I could fit twice the bar here.