I noticed one slight problem that I'm not sure if it is general.
I prepared a new carthaginian standard bearer and made the corresponding sprite.
I also did the sprite for the new sacred band, which in fact has this bearer as an officer and the game uses the sprite of a sacred band soldier for the standard bearer instead of its own sprite.
The result is that the standard disappears when looking the unit from long distance. I will try to put here a screenshot to illustrate this problem.