all the crappy games go FTP with in 2 years. SWTOR, secret world went F2P the quickest i think lol.
took 13 years for EQ to go F2P.
FFXI 10 years and still P2P.

biggest issue of theme park games there all the same with a stupid reason why its the ultimate game. all have the same quest setup, all have the same raid setup, crafting is all the same. the so called "skill games" require you to have the best possible equipment or you cant play with people.