It's obvious that a game, that is lower in quality will also get a smaller player base in the end. You can involve a million of "noobs" into the closed beta and give their opinions on the game the same value as the opinions of experts, and in the end, when the quality of the game rather sucks, you still won't get more players to play the game.. because it is just not that entertaining, balanced, or whatever.
So, by giving those "noobs" the option to directly influence the outcome of the game, you will make the game definitely not better, or possibly even worse. Only by giving those guys, that definitely have insight in the mechanics of the game the possibility to directly influence the game, and only them, you will be able to improve the game. So they don't have to "fight" with noobs about "why are there no two king tigers allowed in one game, it sucks that you cannot replace him if you lose it". And so, they have more time to play the game and give constructive feedback, discuss about it with other players that also know what they are talking about and so on. This will improve the quality of the game by A LOT.
And a better game will get more players.
Once the time is over in which you could really change basic ideas and mechanics of the game, "noobs" are totally welcome, because those new players will then start to grow up a big player base and a big community.
I'm pretty sure tho that Relic will make the right decision about it.
I have to disagree with you here. The highest priority should be making the game playable and enjoyable for everyone. People wont stop playing coh2 due to bad balance (people played how long with op roos?), they will stop playing due to installation problems (confusing errorcodes anyone), patch marathons, crash reports, NAT errors, bugged statistics, bad matchmaking or laggy netcode. 95% of the players wont understand the game balance that much, that they can judge about it.
If you want a high quality game with a huge playerbase, you need a superb technical backbone first, after that enjoyable gameplay and at the end good balancing.
Just compare the technical basis of vcoh with other popular games from 2011/12. Even with awesome balance the playerbase wouldn't rise significantly.