^ +1
New physics is the only real change in the last like 7 years. And even that IMO - even though the intent was good, ruined some great maps (ren/carp). And seeing as no good mappers were able to make another competitively used map since these changes, no new maps to fit the new physics have come out. So it becomes a very negligible change. (not to mention lots of servers never switched so it takes forever to get used to new physics when you keep switching).
IMO Team Ranking System > Individual ranking system. I don't care if it causes clan hopping or not. It makes it so teams have a reason to practice. Teams have a ladder to climb to be the best. It's a team game, not individual game. It's about camping/rushing/capping/grabbing/decoying/reconning, so much more than KDA comes into play that individual stats aren't necessary. Team ranking is much more important.
Not to mention 100000 other things people listed that may or may not improve the game.