Twelve is about right, yes.
There's nothing competitive about this mod, really, or the things it changes. It's nothing more than a different set of rules.
It's easy enough to adopt to a game that has killstreaks and has perks.
Of course I'd love to see LAN options and the chance to run the game with all the rules and limitations one wants but, and I think it's obvious, it opens too many doors.
The performance argument gets pretty old also. 10 years ago, yes, or when CoD 2 came out. Yes, you needed to turn some things down to keep performance at a certain level. But now? No issue.