Customizable Field Sprite for Lord Units?

[Airra]

Right, looking at the stats would give away that something is very off about the unit, and I assume everyone uses the unit's stat window to figure out what units are supposed to fight it...

I haven't gotten to the point where I can have teams of promoted units, yet, but do the varying Giant Square of Color promoted units cause any sort of problems? (Or does no one ever use those because of reasons?)