So, wait, did i get this straight - after this update, you can pretty much experience any Total War Warhammer I content (incl campaigns) in Total War Warhammer II? (Provided you have the first game, ofc)
With increased loading times, yes. The Norsca faction isn't in yet, they'll come in a patch soon.
That means i can just delete 30 gb War 1? Oh, what a merry day.
By how much did loading times increase?
You won't get the same campaigns as Warhammer 1.
You'll get the Mortal Empires campaign, which takes place on a combined Old World with parts of Lustria and Southlands map and would play similarly to the main campaign from TWW1. You won't get the Season of Revelation and Eye for an Eye (or whatever the mini campaigns for Wood Elves and Beastmen were called).
Mortal Empires is also missing more than just the Norsca faction. It's missing the updates for the other races that came with the Norsca update, the so-called
Foundation Update.
The campaign still has some idiotic bugs, most annoying being the Chaos invasion working like it was in the Eye of the Vortex Campaign. Instead of a Chaos force spawning and trying to fuck-up the whole world now 3-4 Chaos factions spawn, each with a couple of pretty solid stacks and ignore everything on the map and come directly to fuck just your shit up. This is even more annoying when you realize that don't declare war on you, they just spawn at war with you so your allies don't do shit. Apparently they just forgot to remove this Vortex Campaign mechanic for the Mortal Empires. If you get TWW2 stick with the Vortex Campaign for now and wait for paches/mods for Mortal Empires.