I've found some bugs with EB units.

First, the Nizag Gund rebel has a vertical gap in it's clothing where you can see through the unit:


Second, I'm having much trouble keeping my army in formation while moving. Pantodapoi Phalangitai seem particularly troublesome, the units regularly fail to stay in a line, ending up too far ahead or behind. There is also a strange curving at the side of the unit that sometimes happens. The following screen shows how my units ended up after a simple move order (alt + right click with the entire army selected, ordered them to march forward).

The archers behind the phalangites have now collided with them, but there was a clear gap between the two lines before they moved. The curvature behaviour is also exhibited. I've had such problems in just about every battle so far. Selecting the Pantodapoi Phalangitai units and click-drawing on the ground also results in them not arranging themselves into a proper line.