Working out the Kinks for Terrain

Working out the problems with terrain generation. I had ideas to add height, different types of terrain like difficult or dangerous terrain, but for now I think I need it keep it simple. I think I had assumed that terrain might be a necessary thing for a tactics game. I am basing my assumptions on what the basic mechanics are of a tactics game from chess. I know that chess doesn't have trees and boulders, but each piece can move only in certain ways, which is some mobility restriction. And terrain creates mobility restrictions.

However after playing the Banner Saga, I noted there was basically no terrain (at least in the first couple hours of gameplay) and it came across well enough as a tactics game.