Personally I'd rather battle a premade with voice chat than face seven hour queues standing around while the game tries to match me to an equally-weak random team. 1v1v1 and multiple objectives means that there is usually a counter for an overwhelmingly organised team especially with the much-needed nerf to cometeor. If both other teams start acting like headless chickens and feeding the dominant group that's mostly their own fault.
I don't know how things are on the English-speaking realms but on ours a team of random inexperienced DF people with a good, experienced leader talking in text macros is overwhelmingly strong compared to a team of identical players with no leader, so blocking premades would make very little difference against the 'issue' of well-organised groups dominating.
And if healers are nerfed even further nobody will ever play them in FL again. It's very easy to overwhelm them now with their lack of counters and AoE tools when you're on the attack.
