One youtuber (90percentgeek) noticed something. All Bret kits are painted in the contemporary colours of Brionne. Except the Baron. He is painted in the colours of king Louen Orc-Slayer. And the baron's helmet and sword looks like those of Louen Leoncouer. But if the Baron's kit can be used as the king, why didn't they mention that during the stream?
It feels a lot, but most of the abilities are fairly simple. Magical Attacks, for example, is only for fighting against ghosts and daemons as they can't be hurt by nonmagical weapons.
Justification for Ogres is that they are not in the Old World part of the world and are currently quite insular.
EDIT: But both Ogres and Skaven will have rules, just no new and returning minis.
First, it makes sense, this is before human wizards even knew about the 8 colours of magic. And the lores are from 3rd ed.
Second, the higher the level of a wizard, the more spell per turn they can cast.