Hey there, I thought I'd chime in here and give my honest opinion on it. I must stress that I don't know anything about the word and lore in which the mod takes place. I only know about games such as Baldur's Gate, Icewind Dale and Neverwinter Nights but hardly ever played them, so... (I've seen some of it when at my friend's house after class at the time which is a long long time ago, in a galaxy far way

)
First off: the campaign map looks pretty damn amazing. The only issue I have with it are some of the terrain textures which don't blend in that well with others making it look a bit patchy, but other than that it looks very good, feels very much alive and populated and looks very interesting.
As for the units, I have very mixed feeling about them. Now I do have to confess that my standards are pretty high. In short: I don't really like them except for the ones that are medieval in appearance and the ones that have metallic armour. There's a faction that looks like they've come straight from Homer's Trojan Wars. Although I think they look alright on their own, it's just weird to see this style next to medieval-styled units of other factions. Again, I don't know if it's all down to lore (perhaps someone could enlighten me on this).
As for the units that I do like (the medieval metallic ones), I'd revisit the metallic look of textures. Now if there's something that's hard to pull off in M2TW it's metallic textures, because you'd have to weigh in sunlight and gloss while not making the texture look too bland (I've been there myself and I'm struggling with it as well. I'm still not always happy with the result that I get on my own units). As of now I'd say that the metal looks too smooth and too dark on the all-metallic units. I feel that the metal needs more texture/noise of its own. I do like the little details on the armour like the leather straps and knobs and the overall design.
Also some units just look funny. They have weird faces and weird-looking eyes.
I did get constant pop-ups of the game asking me to sell all items of a character (with a caution notification that I must do this and that, otherwise it would all be broken for the whole campaign). I thought it was a bit annoying and I'm not sure what the idea behind it is. Personally I'd stay far away from scripts that break easily. Anyway, I think that this part of the game also isn't quite done yet?
Anyway, I think your units are alright for what they are right now. I'm sure there are other things that have a much higher priority such as making the campaign playable and bugfree. Again, I thought I'd weigh in here and give you my thoughts on it. It's looking pretty interesting, so I'm interested in seeing where this is going.
Cheers!