Side note on the fps thing,
Isn't part of the reason there is also such an FPS difference is because we [the community] want to make DMRs/ sniper their own roles?
If we had DMRs shooting 550, every one would use them. Its like Rock Paper Scissors. Every thing needs a draw back or weakness. For DMRS its increased fire rate means decreased range and speed of projectile.
Or am I totally off and this is all an insurance thing?