I'm perfectly fine with the magazine size the way it is. That's a realistic size for the weapon. 5, 10 or whatever round mags would be th unrealistic sizes.
Simply drop the magazine number from 14+1 to 5-7+1, remove the laser sight and fix up the iron sights. That or add a scope. The EBR has rails for a reason.
Fix up the insane recoil reduction so as to make it a sharpshooter weapon.
During a trial run with the EBR, i have found out that a sharpshooter needs only 2 shots to kill a scrake. I have personally seen f**king noobs waste a whole mag bodyshotting scrakes and then getting gutted by them.
Fix it, and they will learn.