No those are some little things that will either break the game or be useless..
Although I can't say anything until it will be tested I'd rather have a look at individual weapons like say..
Hvr (Something needs to be done to balance it's use),Yukon which is too OP in cqc..
Also take a look at some of the most underused weapons like the DMR which needs more purpose in actual fights.
There can be a lot of small and big changes to the weapons but I don't think modifications need a lot of change..