Laser Designation is a really cool mechanic in BF4 which encourages cooperation between different classes and gives the recon(BF4's version of infiltrator) a really important task in squad play other than sniping. And before you call me infantryside (I'm not, really) I do realise this is a serious buff to infantry AV capabilities. Thus it should be followed by a buff in vehicle's anti-infantry capabilities as well, such as the pre-nerf HE,HEAT and rocket pods blast radious and perhaps more (up to debate). Also laser designation could be countered by stealth, making it a valid choice other than nanite auto-repair. You can also loose the lock if you break the line of sight, and you will be given the direction you're being tracked from. The designator also emits a red glow, making it easier to spot the infil.