I second Pirates of the Burning Sea if you want to try a free to play but high quality MMOG. The avatar combat in that game is pretty silly but the main focus is ship combat anyway, and the ship combat is good with a highly tactical feel that I think a lot of CRPG people could appreciate. It's especially clan friendly as most battles are group vs group. There's a map with world takeover as the ultimate objective.
Star Trek Online wasn't a terrible game, but it just had no depth, no story and no war. It's a very Cryptic game -- another game off of the assembly line, meant to last just long enough to get them to their next game, which will be another game off the assembly line. That's their business model and has been since their first release.