I don't know that I would call Northgard a Warcraft clone. The mall is divided into tiles and each tile has its own resources and building limits. Units can only attack other units that are in their tile. There's a much bigger emphasis on building up your tech tree and taking tiles.

Still, it's one of the more interesting and fun evolutions of the RTS genre. If sci-fi is more to your taste, Dune the newer gameby the same studio is similar.