OK.. I have been waiting a bit before posting my first impressions. I love Warhammer, but to be fair I have only really ever played 40k and the fantasy mmo, so the Fantasy IP I have much less personal knowledge of. Having said that, this is a great mod.
I began with one of the Empire factions (Averland.. whoever that is) and got STOMPED into the ground by magically appearing armies that just materialized in my back yard. To be honest, that left a bit of a bitter taste in my mouth after making sure I had watch towers set so I could see any incoming enemies. Then after a bit of a drawn out war trying to thin the enemy numbers, I got into a great battle with my full stack vs. an enemy full stack that I had planned. The battle was awesome (love the large numbers of troops). However, I killed his entire army of orcs and not a single enemy routed (which was both cool and annoying at the same time.. heck, they are Orcs so what can you do). However, the last unit of 20 minotaurs still had like 10 left after the battle was over and they kept on fighting. Those 10ish units singlehandedly tore up about 10 full units of my best melee troops I was capable of fielding and crippled my army. I literally lost an entire campaign to 10 minotaurs in the first 5 turns of the game (Med/Med difficulty) Having said that, it was the most fun I have had losing a campaign in MT2W.
I played an Orc campaign next and so far its not too bad. Vampires are breeding like bunnies to my west, so not sure how in the world anything is going to stand up to about 6 full stacks I saw with my spy but will see how it goes.
As far as difficulty goes, I would suggest a bit of a change after reading through some of the write ups for factions. The developers of the mod specifically state at the beginning of a campaign that assassins are kinda wonky in how they work and pretty much tell a player that they are not really designed to be used. Most of the write ups I read seem to heavily lean on using assassins to take out enemy generals as part of their core strategy. This seems to be contrary to what the writers of the mod had in mind to being with. I would almost suggest that assassins be disabled in higher difficulty levels all together and that lower difficulty levels incorporate the monetary assistance to help with how tough this is. Heck.. the single solitary thing that even allowed me to hang on as long as I did with my empire campaign was my general's healing potions (of which he had 2) That led me to believe that every soldier that died on the battlefield had a 20% chance to be healed after the battle. I do not know if was exactly how it was working, but I was healing a couple hundred after each battle (luckily my highest defense units were the luckiest in this category)
The only way I can ever see me winning this game is to do 2 things: Enable assasins (which I have yet to do) and play on Easy/Med or Hard.
Battles are fun. I think watching a city be bombarded by mortars is kinda cool, but it almost seemed like cheating as 2/3 of a garrison gets bombed to bits. They probably need to utilize loose formations and far more movement around the town streets while shelling is happening (as well as even sallying from the city if they have any cavalry to try and take out mortars/cannons.
Music and voice work: Top notch. The ONLY change I would say to this would be to add more of what is already so awesome... just to make it "more awesomer(TM)"
Lastly, an in game manual of sorts could help. For example, I still have only an idea of what the warcry ability does in my ork armies. I think it is some kind of taunt, but there is no documentation anywhere I have seen that tells the exact effect it has in combat. Other examples are unit abilities such as the charriot in the empire faction. It says it helps with morale but again.. no specifics and no circle of effect when the unit is selected on the battlefield. Also.. as an orc for example, does it help at all to leave any dwarven structures standing in the dwarven cities you take? (there are some that just have a description but no stats. Others say things like 5% public order) Right now I am tearing down any that do not specifically say they provide a bonus.