Even if you get a headshot 25% of the time (which is seriously optimistic) that's 2000 kills per weapon, meaning you need 20,000 kills just for the main guns. Even more if the L-Tag, Mike, Pistols and Explosives have assesments too, and that's on top of rebooting 5 times if you want the 100% tag. I got to level 50 with about 4500 kills, so x5 that and add it and we have 42,500 kills... As the 25% headshot is too optimistic, we're probably looking at more like 50,000 kills for a single, stupid dog tag, which would mean you'd need to get 150 kills a night, every single night, for an entire year.
Absurd.
Wow!
Not that you've done the math, it shows how ridiculous this is. Not only don't you benefit from them in the here and now (from the bonus xp they give), because they are too hard, they would take you a huge chunk of your life to obtain for a dog tag. LOL
I don't think even the most hardcoe fan would do this. If they make these skill assessments carry over it would greatly alleviate the amount of working as you could have 50%+ of them by the time your 5th reboot if you really wanted to do it.
I admit, I really enjoy the mp, but I certainly WON'T be rebooting