Currently still on my campaign on VH/VH as Golden Order. After 20 turns I had wiped out Vampire Counts. After 80 turns I had wiped out Greenskins. Both went ridiculous easily, and there is no threat to be seen far and wide. I don't have to fear the south - Karak Azul and Dwarfs are both world powers and each of the Tomb King factions loves me, Arkhan is dead and only a ridiculously meagre force of Crusader-peasants ever attempted anything like war on me (and were very easily convinced towards peace).
Although I confederated Ostermark (Kislev is gone), the Chaos threat is not to be felt (my only hint at Chaos presence is the little Archaon reveal trailer, which only feels cute now). They started with a slightly higher power level than me and have been absolutely eaten by Karak Azul, who shamelessly expands north. My only contact with chaos were three surprisingly mediocre stacks of Beastmen, which I could have easily left to be dealt with by even more dwarfs and Talabecland/Ostland. I confederated Karl Franz's Empire, leaving me with another 8 regions on top of my mighty empire. All of Bretonnia loves me, and Kemmler sits really sadly in one settlement; the same goes for the Red Duke. I have been continually annoying the Wood Elves by my diplomatic efforts towards friendly relations with human factions, but they won't declare war. Ikit has been a glimpse of threat with 7 settlements at his absolute peak, now extinguished. Now I just confederated Markus Wulfhart whom I had superb relations with ever since giving him 1300 Gold (once). And all the Lizardmen in Lustria love me (Teclis does, too). There are no Skaven left on that continent, and the good guys put up a "heal the world"-collective. Total War? I think not.
So if the coming DLC should feature only DE and Skaven, this might be a chance to make the Empire campaign challenging again. I remember ye olden, golden WH1 days when any campaign would be an absolute anti-Vampire and anti-Chaos slugfest in which the final victory used to be an actual achievement. Norsca used to be an annoyance, even post-update. WH2 used to have at least a sense of urgency when Chaos started showing up, because they were bound to put up a fight and cost you some settlements, tearing through AI settlements like a knife through butter. But since the removal of AR bonuses and the addition of more Empire provinces, Vamps and Chaos have been an absolute laughing stock. Among the bad guys, Greenskins are the only ones who somehow remained rather unscathed but are fairly easy to defeat on their own.
Forward onto Slaughter.