I like your list but I will run down the few things I didn't agree with and my reasons why. Again, all highly opinionated so maybe I am in the wrong here:
-Percussion grenades are VERY annoying. I get very upset when I'm in a good fight and I see a grenade popped at my feet with no time for me to react in cqb situations. The thing is that percs don't do enough damage anyway as upsetting as they are. In fact, over time you realize that when an enemy is throwing percs, it's their final resort and leaves them open to a rushing attack, leaving them dead easily.
-Low-Yields are great in many ways. Low fuse timer (sometimes a disadvantage though), 3 nades, and a farther throw. What brings down their tier of power is the reduced damage and sometimes the lowered fuse timer. Everyone uses concs these days and I found myself long ago switching over to concs since the reward is great in comparison to its risk, leaving low-yields to just be...there.
-Shields shouldn't really be touched. I never use them, but when you face an opponent using shields, its not hard at all to go up against. A simple nade will force the player to move, even destroy the shield itself. And usually a player using a shield is at low health, so shooting the shield enough (which a shield doesnt take long to go down) would spook the player enough to pop out and fight it out. Shields seem to have the most power when used to physically block an important passageway to an objective, like a ladder.
Ehhh, it isn't hard to reach 195 and people enjoy games that allow a progression system to create advantages, which creates a grind feeling to committed enough players.
Not sure if anyone really cares for this
HIGHLY controversial topic. But I believe that N-TECs are fine. They are definitely one of the strongest weapons in the game, but only in the right hands. Give an N-TEC to a newer player, and it'd be trash. N-TEC on its own has a learning curve to it, and once learned, is very rewarding.
The bounty system that is in place now is unfair, yes. The system punishes a player for being good, technically, and I think someone else said that already in this post.. In a way, it isn't a completely bad thing, as sometimes an outside player can take out an opponent of yours that is completely stomping you in the mission, and gives the losing side a fighting chance. What I DON'T like about it is not having a greater punishment for taking out a bounty of the same faction. Way too often, I've been killed by my own faction just by someone wanting to rid themselves of a bounty, or someone just trying to take out my own bounty just for the hell of it. It isn't fun.
Everything else I agree with to some extent. For example, it would be nice to have always had a secondary to be seen on the scoreboard player info and to buff some lower ended cars. Right now the state of the game is seeing the same high ended cars. Over. and over.