No, it's not worth getting anymore. It's a great Multiplayer game (the best i ever played), but support stopped long ago, and the online MP community is almost non-existant, so it would be like buying a beatiful ivory chess set without having anyone to play with.
Now, if you find it for 5$ or less, go ahead, it's worth that just for seeing the gorgeous graphics, characters and scenarios they crafted, and the great gameplay and skill trees they designed.
You won't get anything out the singleplayer portion of the game worth more than 5 $, and MP is dead unless things change dramatically from the developers side, which is highly unlikely.
This is the time when a smart developer releases a free version of the game to attract new players, but smart developers/publishers are scarce these days