I don't care if it has been discussed in another topic, I experienced the soloq merged with 3s rated and it was a complete mess. Anyone who played in servers that have this thing can confirm that. 3s will snipe soloq all day long gaining ratings, titles and much more. Meanwhile SQ players will be demotivated to be farmed over and over again, specially when they are matched with casuals at 1500 mmr.
About 2s it's dead, don't find excuses. Reaching 2k doesn't mean it is active, any mongoloid can achieve 2k on icecrown even 2k2, but after that you will face over and over the same teams, so the 2s is dead.
2s on blackrock is dead after 1600 rating, even worse.