I'm back!
Welcome back!
Uh, well there have potentially been a ton of changes since you left, depending when that was. A lot of features have been tweaked/added. PvP Reward Tracks are a thing now. Traits can be swapped around for free, any time you’re out of combat. There are a couple new zones, Dry Top and Silverwastes. Season 2 of Living Story is complete, and definitely worth checking out (you can get it via the Gem Store, or have any friend who has it unlocked invite you in).
Exotic is still pretty much the standard “best” gear people can reasonably expect you to have. There is Ascended gear as well, which provides a minor stat bump but is far from necessary, and quite a lot of work to put together. So don’t worry, you are not behind in terms of stats — but you may want to check your skills and build, as there have been a lot of balance changes over the years.
Aside from that, it may be worth checking out some of these:
https://www.youtube.com/playlist?list=PLMgOinWh2Y7FbZyBhlqgHoPI2w8_76_1w
You spent alot of time getting exotic gear you say? ran cof p1 I guess, since thats what my friends who burned out on the game did.
Anyway welcome back and take it slow this time so you dont burn out again.