I like the overland and battle map structure, because you can mix up different kinds of events. The first two were battles, which I played, but were a bit slow.
If troops had half as many hitpoints, but you had twice as many troops, the battle would be way more dynamic which would help with the pacing I think.
I like the idea behind the game, and the art execution is good, but I think the mechanics need a bit more work. You could also add some extra animation and effects to spice it up.