We are creating the city together with the CoreWOG team, whose core consists of experienced people who are creating Bastion. At the same time, the cities of Bastion and Haven are being created, as well as a new WOG platform, which can be used to create your own mods, expand tools, and so on.
It would be better to put the Bogatyr on level 6, since in Heroes, most of the units are cavalry units of level 6, and put the Gryphon on level 7. So what if they already exist in Heroes? I think that the way I suggested is still better than what you have now.
And on the other hand, they are just people, like Paladins.
I don't know. Of all the units, I liked the Bogatyr, Sirin, Leshy, and Bear, Domovoy. The rest are not very convincing. (No offense, this is just my opinion).
And the Bogatyrs are made excellently :)