My first impressions: good, but another total war game
Total War is such a great concept but is badly let down in certain areas. The "battle" part could be the most fun, but far out... Controlling units is a nightmare, the interface is neither simple nor explained. i.e. click multiple units and ask them to march forward and you will watch them go in every direction. Yes there are ways around it, but... eh. And how often are units behaving a certain way and you are thinking "why"??? Anyway... I played Shogun 2 heavily and I am disappointed that zero progress has been made in any of the real simple things.
As per the main part of the game, the turn based map strategy. It is amazing how much they have not changed anything. It tends to work but better, though it is much much much more complicated. I am regularly having to google things like "how do I select the unit inside the city again?" (click the flag). But it is done very well........ except........... it doesn't translate to warhammer THAT well. I mean one japanese feudal lord takes over a town it makes sense the buildings and garrison and population are roughly the same. I take over a skaven city and suddenly it is populated with lizardmen? Skaven take it back next turn I guess they are all dead as now its skaven? Doesn't quite make sense.
Overall... it is "good" but I would have thought the warhammer version of total war would have given them an excuse to overhaul the series better. It is good! But some small changes would make it so much better....
But onwards I go...
PS. Any thought of the ethical considerations about playing another race?
Meh, all those mechanics have been the same since well, forever really. They could stand with a bit of a better tutorial (Rome I & Rome II had proper introductionary campaigns) but other than that I don't really have the issue with it. Pathing has improved considerably compared to older games, far less moments where you're wondering where the hell your guys are going and mostly it just takes the straight line. The only exception being when you want forces to pass in between two rocks or something. Some will opt for going around the rocks, some will pass through with the only indication being how close to the centre of the pass the are...
The only mechanic I really have an issue with is that it's very easy to get stuck on a unit. E.g. if you want to attack someone in their back, or get to the archers behind em, you need to take quite a detour to get around them or risk one of your guys deciding he'd rather engage a stray enemy resulting in the entire unit getting stuck, preferably needing 200 commands before moving on again.
As for the switching population, yeah it's weird and gamey, but I don't think you have that many other options... Most of the races wouldn't subjugate others, and many wouldn't allow subjugation instead fighting to the death or resulting in constant rebellions so it's not like subjugating the local population makes much sense.
The introduction of warhammer has lead to the introduction of magic, flyers & considerably more varied races and factions though, both on the battlefield and on the campaignmap.
This, in essence, sums up Total War for me: incomplete.
A harsher person could say half assed.
They just have no interest in putting time to polish the game.
Tbh, this is generally the case with total war since steam give or take. The vanilla game tends to be unpolished as it aims stupendously high. As more and more (free) DLC comes out unit rosters and (sub)faction get more fleshed ultimatly resulting in a good game.
In the case of warhammer I think the biggest flaw is how poorly warhammer tabletop translates to total war. The tabletop doesn't have unit-progression. It doesn't make sense to not have acces to say terradons from turn 1 as without them vital parts of your army are missing. And in older TW games most armies did have a functionally fleshed out army, in contrast the lizardmen start with 2 unit types and it takes till tier III buildings before they get other types available. Similarly black orruks aren't meant to replace your goblins in the tabletop, but in a total war game this progression from "weak" to "advanced" is important. The only ones that sorta work are the stegadons, going from feral all the way to ancient. They should've used that model more for other units.
Overal, the game is fine. The more (free) DLC comes out the better it gets and with the entire set of DLC it's probably one of the best TW games I've played. The introduction of magic & flyers is interesting, and the large degree of assymetry between races is amazing. But just like every TW game it has several oddities and unfortunatly warhammer tabletop didn't translate
that well. It might've been better if they had just made up their own stuff to actually achieve that sense of progression.