Sorry, I'm still not seeing how you're coming to "50%" of players are going to leave because we have will soon have a mechanic to identify organised teams out of a crowd of random players to ensure that Random Players aren't penalised for not playing exclusively in Teams. If organised teams were serious about being organised, this wouldn't be an issue at all because they would welcome any mechanic that ensures more organised teams are playing as a team against other organised teams.
Are you really having a hard time understanding? I said I believe that it would be 50%. I never said that it will be. My concern is that I believe premades make up half of the players, and as Frogboy even said, the game was designed to be played with premades. Pickup groups work but it is a lot more fun to play with people where you can work together, usually through a voice server. The reason I expect these premades to stop playing is because they will spend long periods of time waiting for another premade to roll along that is compatible with their game options (which I said in my last post).
To spell it out, say I have 3 friends that want to play, I start a 4v4 premade game. Normally it takes anywhere from 5-15 minutes to get another 4 players. Now lets take away half of the players, since they don't want to play with a premade. It would now take twice as long to form a game, so 10-30 minutes since only premades will play against us. But we also are looking for a 4v4, so a 2,3 and 5 person premade can't play with us, so it could even take longer.
If it only took 30 seconds to form a game today, then 1-2 minutes to find a premade would be ok. But the demigod community is very small right now.
I play with organised teams every night over LAN, Hamachi and through the offical server browser. You simply need to put your feelers out there and make contact with other teams in your time zone and get organised. That's the primary reason why have an offical set of forums - this isn't just a place to give your opinion.
I can't speak for other premades, but the people I play with change every day and the times we play change. We are in a sense a pickup group in a ventrilo server that then plays demigod. We do play with the same people a lot, but it is not something that is organized. I am not about to spend time to try to find other groups to play with. In fact, when we get more 6 or more players, we just play against each other, since we don't really care who we are playing, we just want to play.
If a game needs people to post on forums and do a lot of leg work to play, the game will fail. The game needs to have a mechanic for doing this and the player base. Try League of Legends if you want to see how premades can be done right (the game sucks, but the lobby system is much better then Demigod), or even a game like Left 4 Dead.
Not to be rude, but the only reason you're fears could come true is if every organised team existed for the sole purpose of crushing random, disorganised players which simply isn't the case. If it was the case, then - as I said - I'm looking forward to them leaving the community so the rest of us can enjoy the game. The demand for this change is a result of Premade Teams stomping disorganised, random players again, and again, and again.
This is a very narrow view of the issue. I don't disagree that premades that like to crush noobs won't like this system, and I agree, I would rather see them leave. But my concerns for the time it takes to form a game can easily get most of the premades to stop playing since they can spend the same amount of time that it takes to play a game looking for a game. Would you be ok with sitting in a game lobby for 30 minutes waiting for people to join, or would you move onto another game?