I started a new Tyrion game and I can't confederate the other HE nations, no matter how high my relationship is with them, which is great. It makes the game slightly more challenging and logical. (I think it is linked with your army size whether or not they accept the confederation offer).
And the other HE nations didn't attack each other (except for Saphery), which is very thematic in my opinion.
Usually Tyrion starts the game with two wars already declared against Cothique and Yvress. Instead there are Dark Elves in Eataine, Vampire Coast in Caledor and Greenskin in Yvress... which makes for a nice and interesting start. The first quest is to conquer the Phoenix Gate (which suggests getting rid of the DE on Ulthuan) and which leads to a natural progression towards the DE in Naggaroth.
And I really like the change that basic Spearmen and Archers don't need the basic "Barracks" building anymore.
Overall I really enjoy the new HE changes.
Eltharion and Imrik are great aswell!
I guess somewhere later in TW:WH3 Korhil will come for Chrace, and maybe Caradryan as a FLC too.