I wouldn't call it a cheese tho... I don't use mine unless i see the enemy team equips it, then i level up to their point and do the same. I have never switched between sidearm/sniper don't even know how that works. But the icebreakers perk is just a great perk, no cheese but a certain exploit. I was tired competing against thorn user so i said to myself, screw it gonna get it out of the vault! Haven't regretted so far!