Only major ground content missing, I believe, is the Imperial Crackdown, where faction NPCs would stop and perform random searches on players as they passed by in cities. From what I understand, implementing this requires a pretty substantial rewrite of the AI code. There are most likely a ton of small tweaks/changes that still need to be done to things like abilities or items as well.
...but yeah, I think we're getting pretty darn close to JTL! Close as in, several years still.