Well you can't join for the second time if you didn't do your first. Yeah, game still active.

Worth it how?
Gameplay: Watch some streams or youtubes with gameplay and see if it fits what you are looking for.
Activity: If you are worried about activity: as Poppy said: the game is still very much active.
Other? Let us know what is making you doubt and we can give a more specific answer.

Is always a good time to join.