If it isn't a huge problem on a global scale, I push to move for Bioware to implement character transfers instead of a server merge. That way, individual players can take it upon themselves to decide whether a server's population is an issue or not. If they decide it is, then all the benefits (bigger population; new community; sense of community) and dilemmas (duplicate names, loss of friends/guild, faction pvp dominance) that come with realm transfers will be of their choosing.
I only ask for the cost of a server transfer be manageable.. $10! <- I am a cheap being
However, if Bioware did have $10 promotional sale for a limited time (1 month, 3 months, until Summer 2012), it could possibly bring back many players who left due to "ghost town" servers. It could also allure players who are RL friends but created characters on different servers. Pricing the cost at a whopping $25 might further deter players off swtor.