Lords of Everquest is worth playing.
Being able to pick a race/class that you want to play makes it fun and adds to replayability. They all have unique spells and abilities, so finding your favorites is easy to do. Having all units gain levels is interesting, too. It makes for a little more strategy during game play by deciding which characters to carry over and trying to protect them during the fights.
The environment may not be the most graphically spectacular, but it's done well enough to make the game believable in the EQ world. As with any RTS, it's not an open world to explore and you're limited to where you can go, but that's on par for the course.
Overall, Lords of Everquest is a game well worth playing for any RTS fan. It's not the most polished there is, but it's a game and a story that is fun to play.