Dragons are certainly a pity, but frankly, the units were useless. The entire undead army relied on skeletons, vampires, and liches.
However, the concept of the Lamassu is undoubtedly pleasing. This creature is described here ---> http://www.liveinternet.ru/users/eugene_xaar/post140492640/ (it's definitely not a sphinx)).
In terms of properties, it vaguely resembles a mix of dragonflies, wyverns, and zombies from the third game (they inflicted weakness, decay, and poison; the Lamassu, judging by the descriptions, transmits a plague, most likely it will be "plague" or something similar). So, the unit will be useful.
Like many others, I will miss the riders.
I wonder if the liches will retain their wide area of effect?
The Spinners are still a mysterious unit. I don't quite understand what role they will play in the army. Probably something like tanks.
The topic of ghouls and their name was raised here; in the Russian version, the word "upyrs" could be used, which sounds a bit more disgusting and colorful, in my opinion. :D
Regarding the architecture:
On the one hand, I'm used to seeing the Gothic style in the undead, but on the other hand, the Egyptian-style architecture probably serves as a contrast to the Eastern style of the Order mages... something like that
So seid recht gut auf allen Wegen...