And then neglecting to mention that it took the best progressive guilds in the game months to clear the content. It obviously wasn't intended to be cleared by most players easily and on day 1 (and wouldn't have been able to now either). Most guilds are still filling out gear slots from Kara. We were in Kara week 1 and still need plenty of gear for our core 25. And everyone knows that the tryhards just want to power through content ASAP and then sit here and bitch about having nothing to do for a year.
If you want all TBC content out in the first 12 months, by all means encourage 2.5 month phases. If you actually want to enjoy the game and don't have 12 hours/day to play, maybe pace yourselves. I promise you that, if you're already fully decked in t4/BiS, are sitting on honor cap, have all season 1 pieces, maxed professions, etc. that you are in the very small minority of players.