So in tron it seems more then most systems the advantage is on the defender. Because of trons arenas and the kinds of obstacles you typically find which make good cover and transversing long distances hard. Because one is also allowed to cover ones gun sensor on walls this affect is even larger. Not to mention that in chips mode one can continue to tag inactive opponents all the way to the base. It seems the better teams are pretty defensively minded in tron for this reason only attacking when their opponents onslaught has been weakend.
So remember kids, tron wants the d-fense.