The Problem:
The "Tonnage limits, no class restrictions" only really works for one-offs. Sure, a team that has
one guy stubbornly piloting four Commandos because "I'm a light 'Mech expert!" can probably hack it just fine...but what happens when the matchmaking system has to put seven different "I'm a light 'Mech expert!" guys together on one squad?
You end up with a team several hundred tons below the general region where it would be, and the handful of dudes who brought the big armor are thrust into the unpleasant position of having to carry thirty Commandos while the enemy team is coming at them with a far more balanced loadout. Those bare handful of heavies/assaults those poor five guys managed to bring in are going to ablate away in no time, and then the enemy team will just roll through the horde of Commandos without any real issues.
This is, of course, to say nothing at all of the groups who'll find a way to drop with fifty ECM Trollspiders and grief an entire half-hour CW match just because they're bassholes.
While a great idea on the surface, it's just not tenable when applied to the whole of a team, or to jackhole griefer units more concerned with making their foes hate MWO than with winning their matches or advancing their faction's territory.
Edited by 1453 R, 25 September 2014 - 11:36 AM.