Not sure I agree 100% with this.
The idea behind the Ballistic Vests were sound, you provide extra protection for your team, which is realistic. The problem was, they did it wrong. They made it so multiple people could put out vests at once, and you could put more than one vest on at a time. If they do have anything like this in BlOps 2, perhaps make it so that only one set of vests can be worn at once, and you only get to put one on per life. Seems simple to me.. I can't put out a chopper when another is in the air, so why not just put up a message (Can't place vests, already in use). The other issue is that people are spamming them by only choosing them in their Killstreaks, so every 5 kills they are getting more vests. Make it so that you either choose a complete killstreak cycle, or you choose NO killstreaks at all. This way they aren't constantly popping up. I personally like the idea of being able to put something out that helps my teammates and not just my Kill/Death.
Flak Jacket was flawed, but not all that OP. My biggest beef with it was that people could walk away from explosions with no repercussions. I understand it protects you from the blast, but I am pretty sure you'd still be effected by it. Maybe walking through a Claymore would send you flying into the wall and stun you for a second or at least stagger you. Getting hit by a rocket or tube may knock you off your feet, causing you to scramble back up. The way they had it, the screen might flash red for a second but you kept charging ahead like a raging bull. That being said, you still showed up on Radar and were susceptible to Air Support, so it wasn't OP enough that it took away from the game that much.
What I think is "Wimpy" is the ricochet that MW3 introduced. Black Ops hardcore got it right. You can't just run in front of teammates who are firing, run blindly into an airstrike, or toss a random grenade into a room where teammates are. 3 TKs and you were gone, a fair amount as hey.. stuff happens. The only caveat to that is the host couldn't get kicked, they fix that and its golden. MW3 hardcore is a sad shell of what it should be.