To the OP: Worth it is subjective. It really depends on what you're looking for. If you're looking for something with the same amount of content and player activity as WoW keep looking. RoM is more of a WoW-light. Always has been. Nowhere near the content of WoW but gameplay is similar and not nearly as involved - i.e. no difficult rotations, healers don't have to manage their mana, tanks typically don't do much in RoM other than run in and start whacking the boss first (from the perspective a former wow raid leader - vanilla through cataclysm).
Rom doesn't do dungeons like WoW does, just 6 and 12 man raids. End game raiding does happen but not by a huge percentage of the gaming population. The game is still P2W at end game so most raids have devolved into burn fests to keep the P2W element alive.
There's only one server now. Gold is pretty easy to get. Don't need to spend any money on the game to quest or run around but if you want to raid at level cap you'll have to invest a good amount of RL money or a lot of time to do the same thing as a f2p player. Hope that helps.