They were really small. About 10*20 tiles. I agree that the game wasn't good because of it's combat. Wasn't good for any other reason either.
For the other games though:
Into the Breach is a pure combat tactics game. The combat is excellent, the rest is somewhat weaker than in FTL for example.
In Banner Saga the Combat was actually the part I liked most. As the story and character developing had it's problems and the resource management was horrible.
Skyshine's Bedlam - The combat was the best part of the game. The resource management didn't work well unfortunately. It's a shame that the developer seems to be defunct now.
Tahira - pure Combat game. Actually one of the best tactics game and I strongly recommend it for that. Just be aware that while it states it's an RPG, it is not and not even has RPG elements.