I actually like the idea that everyone will be riding horses. You could make the horses very different, like in the fifth game – for the Necropolis and Haven factions. And the fact that demons will finally be riding instead of running on foot is also good. They could have been put on hellish steeds, for example. But in the screenshot, it's clear that the horses aren't that different.
By the way, in the fifth game, it didn't make much sense for demons to go into the stable and increase their movement speed without horses. What, did they get their legs re-forged or replaced in the stable?))))