From my experience on playing different online games, a server merge has always resulted into a bad idea maybe not always but from my experience it has been.. As Vampire said, it would be laggy.. plus more douches to deal with, more hackers and scammers, more pedobears and stalkers, more drama and the list goes on. I remember a game i played that after the server merge, more peeps quit so it turned out to be a total backfire for that server merge.
Links to important stuff:
Transport Quests: http://wlodb.com/topics/99
WLO Pets: http://wlodb.com/topics/13670
WLO Emoticons: http://wlodb.com/topics/6195
PSN :)
TAURUS SERVER (NOT UPDATED - NO LONGER PLAY)
DRAGON CAVE - Click or see them if u will lol ^^