All they need to do is nerf the damage done by tanks on the mcom stations. . . .
All they need to do is remove the ability to blow up the mcom entirely. Even though it would technically cause there to be only 1 way to take an mcom as opposed to many varied ways there are now that all involve blowing it up, it would actually make the game more interesting.
The dilemma caused by people being able to play "lame" in rush is why there were never any big competitions in rush mode. Squad rush only became acceptable (and actually quite awesome) recently when a strict rule set was imposed on it to make it actually interesting instead of people standing in their spawn with RPGs and noobtubes, or teams of 4 medics res training across the map for hours.
Some of the Squad Rush WOGL rules:
Per squad:
-Only allowed to spawn 1 medic.
-Only allowed 1 40mm GL.
-Only allowed 1 shotgun (Excluding 40mm).
-C4 Only may be actively used by recon.
-3D/Minimap spotting off
-Not allowed to directly destroy the mcom.
-Not allowed to directly destroy the mcom building.
-If the mcom building goes, the mcom is worth no points.
-no m60/gustavs.