These are all great suggestions, all of which I'm sure will be taken into account when Treyarch makes their next game.
The key word here is Treyarch. IW has too much pride in their failed forumla to take note any of the good ideas that Treyarch had. That's why they half-assed so much of the stuff that made Black Ops good:
-Map quadrants (or lack thereof)\
Along with all those small things that made Black Ops a good game. I'd love for the Scrambler to jam Claymores, Betties and other equipment. However, it wasn't IW's idea, so they won't use it.