Personally, I think it would be worth trying to get 10 patient people--5 horde, 5 alliance, 1 of each who has a P2P account--to try it again. The system seemed to be working, but what people aren't reporting in this thread yet is that we had other complications: we had one person who had the deserter flag, we had groups with differing numbers, and we had people linkdead in the groups... just bad timing. I don't think it's quite time yet to put the nail in this coffin.
Yes, I'm saying all that with full awareness of what the Blizzard rep said. I think that it is possible he is wrong, that he gave a quick answer to a leading question, or that he blew you off because of your account status. I also, incidentally, think that it is completely wrong-headed, for both paying players here and GMs in game, to dismiss trial accounts. Blizzard created the business model because they hope to gain new paying customers out of it: they already have the business of the paying customers, and if they want more, then they're not going to alienate a potential revenue stream. I'm not saying they're going to fix a trial account's problems before a paying customer's problems, but I am saying that it would behoove them to respect everyone who shows any interest in the game... and it would behoove P2P members of this community to do the same. If you really want even some of us to consider paying for an account and joining you in BGs, you aren't going to get many converts with your vinegar and vitriol. You can't goad, cajole, or shame someone into doing what you want them to do... we should all know that by now.
Having said all that, I would be willing at any time I'm on to do some coordinated testing of the Wargames system. I am patient and have the vent info, and I have a vested interest in seeing the community prosper. Well, that is to say, we all have a vested interest in seeing the community prosper... I, for one, am willing to step up to help in the work to make that happen.