How about no knifing at the end of a sprint run?
How about only one grenade for a grenade launcher?
How about one grenade launcher even if you take overkill?
How about no shooting while jumping (AKA bunny hopping). You can't shoot and sprint...
How about increased kill requirements for airstrike and helo?
How about A BLOODY HARDCORE FILTER!
Just a couple of things..
And I agree, the ACOG is excellent, especially on the M4