With my new character I am currently at the Orobas fjords. I did not see any difference so far between "original" Ego Draconis and this version. (except from the mentioned new loot)
The biggest changes are at the Fjords and Flying Fortresses. The imp-filled road now has goblins, and far fewer than there were imps, and the Flying Fortresses have been completely re-worked. Also, the sets that used to be in the Flying Fortresses (except for Ulthring's) have now been scattered all over, starting with Sentinel Island. (Hope you found the three different pieces there before you got your tower.)
The other changes are that your level makes much less a difference in the damage dealt and taken by enemies of different levels and ranged attacks and spells move slightly slower, enough to reasonably dodge if you pay attention.
