Every time I try to get back into Destiny I bounce off hard. I finished the "legendary" Witch Queen campaign and that was OK aside from being too easy for the Legendary title, but the core loop just doesn't change enough. Grind bounties and playlists. It seems like they gave up on PVP.
I'm really interested in the story, now they're finally bringing in Xivu Arath and doing the Exo Rasputin stuff that was cut with the original Joseph Staten story? But the overall game has pretty much stopped evolving.
This season they overhauled the PvP experience. If you had any interest in Destiny PvP, I'd look into it if I were you.