This is a suggestion to allow players to set their line's tactics before a fight begins to give them tactics that they will use within the stage during all three parts.
There are many times when your team starts to fight the other line and they do some pretty dumb things like all attack an individual enemy, or fight the heroes which dont matter while you get instantly destroyed, or any number of bad AI decisions which result in your teams loss.
What I wish I could do is set what types of heroes I want my team to focus on in battles like support, range, tanks, ect and in what order they should do it in. The AI is not great but it would be nice to be able to do this.
Or even as simple as being able to click on what enemy heroes I want my team to focus fire on would be a godsend.