From what I have heard, I do not have the Feb issue of white dwarf yet but apparently there is a 12:1 ratio of soldiers:heroes now, which is not too bad unless you are goblins, but then again a dragon probably counts as a hero. There is also no type of alliance restrictions like in Legions of Middle Earth, at least not yet, that may be in the new rulebook.
Certain heroes allow certain units to be upgraded for a points cost, ala Grimbolds Helminggas and Mahurs Marauders. The upgrade depends on the hero, I don 't know if there is the possibility to add two upgrades with two heroes.
Not crazy about the lack of list restrictions as in LoME, especially if there is not a bow limit.