Big thing: improvements for alts, like the Warband system of account-wide reps like on retail. Looking at the potential for multiple Argent Dawn or Furbolg grinds on non-raiding alts like... maybe I don't really need the profession recipes or dungeon sets.

Stop changing classic...they broke retail bely constantly adding things over and over and making it extremely complex to the point where you have no idea what's new vs old..classic is now doing the same.

Private servers fix the mess that is warcrafts complexity because they don't constantly change the game to attract the lowest common denominator