Well this is going to sound strange but I'm a bish and I don't like this idea. While it is frustrating at times to have to deal with the sometimes overwhelming numbers of the rooks, I don't like the idea of paying customers being restricted on their playing time. I know I wouldn't want to be. Even if it was just for a minute, people aren't paying for a waiting room. Still, this leaves a problem with numbers.
Possible Alternatives
Instead of doing all this stuff to existing players, why not just funnel all new accounts into the sides with the fewest subscriptions. It may take time, both in skill development and simple number growth, but it doesn't step on anybody's ability to play.
Or, further expand the perk incentives and deterrents. When one side gets way more numbers, planes that wouldn't normally be perked magically cost 2 or 3. This only applying to the most popular planes like the la7 and nik. Perhaps it could also be possible for a normally perked plane to even become free when faced with a large opponent.
Anyway, my thoughts.