BF2142 had a large test, but at that point it was primarily bug testing. There was no way they were actually going to change things for the players. This is EA we’re talking about, they probably had the CDs out for duplication by the end of the first day of the beta test, and the following days where for working on the 1.XXX patch.
With ET:QW we are talking about asymmetrical gameplay. The only FPS I have played that also has some of this is PlanetSide, and that was run by SoE - therefor its failure to really be a big game. However, the Asymmetrical teams requires allot of balancing, and the best people to do this is experienced clan players.
See, the clan player has developed beyond the average, ‘get-on-a-server-and-frag’ player. The clan player has learned to overcome obstacles and to work together to meet goals. They understand how to manipulate the game to play in their favor under all circumstances. All in all, they understand FPS gameplay inside and out. The fact that team X has flying Mechanized Assault eXosuits while team Y does not, will cause newbies to throw a hissy fit and complain. The clan player will analyze the situation and create tactics to nullify the extra threat. If the tactic requires much greater energies to overcome the threat than the non flying MAX, AND the scenario/map/mission becomes unwantedly unbalanced because of that object then it is pronounced unbalanced. It very well may be that the game designer has wanted the one MAX to fly for terrain reasons, etc…
So yes, a MP Test is needed, not only to test for bugs, stability, and playability, but also for gameplay, balance, geometry/maps, etc…
The test would need to include 2 maps (Strogg on offense, then GDF on offense), and all classes. Only 2 classes shows that you really only care about playing the game and not about testing it…