As soon as an enemy mech steps off the base the cap bar starts to slowly refill which prevents the use of the capping to 99% tactic and then if things go bad in the fight, finish that last 1% to win.
Capping needs to exist as a system to give a weakness to teams that have tons of firepower but a slow movement speed. If caps are removed these teams have no weakness and there is no reason for anyone to play a mech that is not an Assault or Heavy.
Before someone points out the maneuverability advantage a lighter team can have I'd like to point out that many assaults can still keep their weapons focused on lighter mechs by turning at the same time they torso twist to easily hit the faster moving mechs.
Edited by Zylo, 21 April 2013 - 06:43 PM.