25 mans are already rewarded more. They get more loot and because of higher class diversification the loot they get almost always goes to someone. In 10 mans we are constantly de'ing loot because no one needs it however there is loot that people need (it just hasn't dropped). It seems to me things are balanced now. The only reason 10's are more popular is because it's more fun and easier to get along with 9 others rather than 24 other players (totally my opinion of course).