With each new patch I hope that CA has balanced the game's economy (and supply lines) problem, which favors doomstacking, and I was disappointed in each update.
I may be the weirdo, but I don't enjoy playing the first 20 turns with tier 1 units, then suddenly switch to max tier level. Warhammer is a fantastic saga, and it is wonderful to play a Warhammer Total War. That said, I enjoyed the campaigns in the Proving Grounds beta more than the rest of the Warhammer 2 lifecycle. Slower, using intermediate units, managing the economy better.
I wish they removed the supply lines in Warhammer 2; if it is necessary to carry out a control of the player's snowball, it would be much more interesting if the penalty was for the number of repeated units in the same army, and not for the number of armies. It would also be nice if the settlement construction had penalties / bonuses, and not just bonuses. That you had to build under a certain criteria, as in other Total War, and not automatically and mechanically.
As I doubt I will ever see such an update in Warhammer 2, I sincerely hope Warhammer 3 has a good campaign job. Mortal Empires is boring after the first 50 turns, because you only find doomstack. And it's not like you can play any other way.
CA models a lot of units that can only be enjoyed in multiplayer, because in the campaign you never need them, directly. Who hires Lions of Cracia, if in a couple more turns you can hire Guardians of the Phoenix? Who makes small reconnaissance armies, if it is better to have a doomstack with which to auto-solve 90% of the battles?
That sums up the Mortal Empires campaigns from Warhammer 2.