i'm happy they are merging, more people for me to kill. I have a good time with this game even though 99% of my guildmates moved to the next MMO of the month.
Many of the playerbase have been asking for merges due to low population counts
as for why they added so many people after launch, i blame the MMO FOTM community on that. You know, the poeple who get in on beta and pre-order, then become disinterested, bitch and complain about the game in game chat and ultimately move on to the next great (or not so great MMO). Darkfall, AoC, Aion anyone? Didn't think so.