I see all around players being able to cheese fights by range attacking their enemies without triggering the actual fight and the turn based mode.
This makes ranged attacks overpowered and totally isn't the difficulty the programmers aimed to and gives so much space for making the game unbalanced and easier trough an exploit.
So my opinion is to give more line of sight to the hostiles and/or make them aggro at a higer range (idk if units have one, the other or both of them).
I'd say any correction in this direction (say adding the minimum value) would drag the game in the direction of balance, the way developers intended.
This suggestion seems so obvious that I suppose it has already been made, in that case I apologize.