I don't think it was a popular decision amonst training lobby players. From what I remember from being active around that time, I simply remember comp lobbyist crying on the walls about inactivity in Comp games and begging for Trainers to leave T-Lobby and stop playing 'newb' setups.
Instead of thinking of them like this, think of of them as the setups that people liked because they were fun, and you could play them and have said fun and not have to worry. Still took a little bit of trying in order to win these 'newb' setups. Also you have to realize that most people didn't actually consider their score/trophies to be a representation of their manhood like Comp players seem to do. Most of us played for fun and the accumalative 'total points' was just numbers you earned after a game. Sure it's fun to have a high score, but as the kind of intermediate lobby, I could simply see that most people enjoyed the games themselves and not the outcome of said games, which we DO NOT HAVE ANYMORE.
The only people at the time who complained about anything on the site were Comp players who were mad that nobody in Training wanted to step up to play Comp...
Real quote from Comp Player I swear: NOT ENOUGH PEOPLE IN COMP LETS MERGE LOBBIES SO WE CAN HAVE MORE PEOPLE RUN.
Real quote from same Comp Player, I swear: OH HES THROWING AGAINST ME. INCOMING GAMETHROW. WHY ARE THESE GOD DAMN NOOBS PLAYING COMP. OBVIOUS GT ALT. HES PLAYING WITH SOMEONE ALOT CHEATER CHEATER. OBVIOUS GY VISION.
And now you'd have to be daft to see why nobody in T-Lobby really ever cared for it... the culture you guys have in Competition is absolutely awful.
Nobody wins a trophy without playing lots of games with the same person. I'd like to see the last person to win a trophy while just joining games randomly and trying to win against the people in the game, rather than win with their friends or whoever their Em love is etc.
There is an obvious gap between players who want to play red heart games and setups that are now protected and locked down and blacklisted by people trying to protect the meaning of what internet pixel points really mean...
Somebody else getting points for playing Reverse shouldn't effect your life or your EM life. For example.
Sandbox and Training were the two most popular lobbies for a reason, people. Can you just stop turning a blind eye towards it now?
TL; DR
UNDO THE MERGER AND REAP THE REWARDS OF A BETTER ALL AROUND COMMUNITY.