Why not?
If this was CK2 with field battles, it would be perfect.
The only real drawback to making Bannerlord into CK2 would be that I highly doubt the devs are capable of pulling it off. Some modders might be able to do it, but right now, Taleworlds should be focusing on fixing the crashes, memory leaks, and gamebreaking bugs. Once the game is playable without mods, then add new features.
That's exactly what people were saying when action RPGs first became a thing, and yet here we are. We're playing an action/RPG/RTS/4X hybrid.