I'm back !
There has been soooooo much added/changed for better or for worse. You best check the patch notes/dulfy/google etc. Way to much to explain here. Hope you enjoy the new hand holding leveling system!!! Many will say postive things, many will say negative things. Both sides have very legitmate concerns.
You will have to purchase the 1st and 2nd episodes of the new living story if you haven’t logged in for a second to get them free when they were active if you want them.
ascended gear and forever harvesting tools have become account bound and are shareable. Makes a big difference.
endless tonics are now sellable if you never used them. Probably not useful to you.
ascended crafting is available for all except jeweler and cook, which makes skill points even more valuable. The new trait system also makes them extremely valuable.
Starting a new toon is completely fubar IMO and that sentiment is shared by many. It requires a different mindset. Too many changes to list here, if you have a slot with no toon then the best way to get familiar with it is to build one. You will probably have a very strong opinion once you do.
various nerfs and tweaks, if you played war then you may be scratching your head as to why they nerfed rifle further.