well, from your list, 2,3,4 and 5 are all extreme personal preference involving themes...
Themes are, of course, all personal choice.... we like both the Core and the Curve themes. That's why we used them as the default for 1.1.x and 2.0.x. If you don't like them... then find a theme you do like. Why should we change the default theme (just because you, personally don't like it?0 when it is simple as a single click for you to install a different theme in it's place?
1- category descriptions... six of one, half a dozen of another... but not a bad idea.
6- we already have that as a core feature. click the little icon at the bottom right of your post...

7- ease of use? huh? unclear statement....
8- huh? how much more simple can the BBC buttons get?