Get Teamspeak. AFAIK, you can't do it without the license. I could be wrong, but if I did, it means that it's too hard
This is about UI, go post the topic(s) somewhere else... but I'll answer a bit
7, there's an idea about health and armor drops from dead body, which kinda works like OldRen's single player mode
8. ....needs EA
Number 9 seems to be very hard, if not impossible, without completely modding the game and forcing people to get the models as well. Again, could be wrong. And I'd love it if I was wrong about it btw