[UninspiredName]

This would be a bit different than most of my other suggestions, but it still wouldn't be terribly hard to do. It would be nice if Illwinter made the original unit sprites available for viewing. It would be a great help for copying the 'style' of Illwinter's sprites, and would very much come in handy for those that would, say, want to give Caelum's army different weapons.

I admit to being personally biased here as my entire modding style revolves around modifying the existing sprites, and it's likely not as good in the work/reward department as other ideas, but it's something to consider nonetheless. Sorry for the double-post.