Been a huge total war fan since medieval 2 and warhammer 2 in my opinion was the best game I've ever played.
I waited months and months for warhammer 3 to be released and hoping for loads of new factions and units and everything, only ro be let down by a heavily focused chaos faction list which let's be honest is basic and very boring.
I've racked up several hundred hours maybe more on warhammer 2 and still do not get bored, whereas an hour on a faction campaign on WH 3 and I'm turning it off.
The only think keeping my from uninstalling is the possibility of an Immortal empires in the next few months, but I'm getting more doubtful by the day.
I'd save your money for the time being and buy something a bit more gripping, at least until DLC comes out.