I agree. It's pretty hard to keep my creatures straight by ID number. When trying to level up, I write all the ID's down, make different combos, and then wonder which ones they were.
One nice option would be to be able to sort creatures, or have a tag below them that shows rituals they are involved in.
If I could rearrange the creatures, I could put them in the order I needed most. I understand this might cause some technical difficulties. So here is another suggestion. Could there be a name creature option? I think most people would have an easier time keeping names straight instead of 6 digit ID codes.