Been playing this game occasionally since school went online in March. Good concepts overall, ruined by CA's aversion to fun.
1. AI dwarf and Empire always blob and become too big to fail. Chaos invasion will never amount to anything. At all. Even with a mod that multiplies the amount of hordes spawned by 3. They always get crushed by Franz's northern doomstacks.
2. Towns take forever to improve (and the whole process of starting from scratch makes no sense lorewise, obviously).
3. Having actual borders is a pipe dream. Catching the AI while they yeet their armies deep into your undefended territories is essentially impossible. Especially since they tend to have 2 times the amount of stacks to throw at you from all the bonuses to upkeep, income and recruitment they get.
4. Every time you capture a settlement, it loses a whole level. Combined with the two aforementioned elements, this can lead to a very degenerate type of save scumming, as losing a single settlement, even if you recapture it the very next turn, sets it back up to 100 turns worth of investments and growth.
5. Why are battles so fast. That speed should be anathema to any Warhammer fan, since the actual wargame is all about carefully thought out maneuvers and long moments of reflection.
6. Most faction specific mechanisms are underwhelming. Simplistic and feel like 10 lines script implemented by a modder for free in the workshop.
7. Sieges battle maps look absolutely gorgeous, then you find out that you're gonna fight in the most boring looking corner while ignoring all the nigh impregnable structures right next to the battle area. Like they have to rubb it all over our faces on top of that.
8. Turn times get progressively worse as the map devolves into gigantic continental blobs warring, discouraging me before the late game actually begins.
9. Some characters that should be god like entities of immeasurable power are basically lords with a few extra bonuses. They just couldn't think of another way to balance them (despite the lore providing plenty of ideas to do so).
10. Some factions are clearly favored, and in some cases we can all deduce why.
11. The AI breaks more often than not. Hence the major cheats granted to them at higher difficulties (who don't seem to actually make the AI smarter)
12. Game often feel more tedious than challenging, as you manually crush the same stacks over and over. Could have made battles slower but more decisive rather than speed them up to have the players fight one inconsequential skirmish after the other.
13. Takes forever to be able to recruit elites, and by the time you've built the right buildings in your older settlements, your legendary lords stacks are on the other side of the continent giving you only one highly impractical option to update their line ups. You're stuck with dull basic tier one and two units for a long while, but the AI unfortunately doesn't seem to be dealing with the same restrictions.
14. Diplomacy is an unworkable joke best left ignored
15. Cannot go tall. Blobbing is usually your only option
16. Quests, scripted events and story feel like they were tacked on an existing game, rather than those elements forming a cohesive whole.
That list is not exhaustive. I could go on for a while.
For a company that's supposedly been focusing on the same franchise for the past 20 years, the gameplay is surprisingly amateurish.