Just that Factions that are less boring
More Interesting Wizards
More faction specific units and gear less generic more Diverse Units
Faction Environments that aren't just Grasslands or Wastelands
Global powers you can see even WoM had some
Because that's the biggest problem with this game, from where I see it, and this isn't just my opinion I'm seeing this echoed again and again from other users, from reviewers, the number one thing this game needs is more depth, and depth doesn't lay solely in the mechanics it also lays in the aesthetics.
And if anyone wants to disagree, tell me there's no difference between a wookie and an ewok if they do the same thing.