Actually, I'm really quite fond of the interface from the remake of Colonization in one aspect (Well, more than one, but in specific...), that it has a button you press to bring up a list of the possible promotions when you have any, instead of having them take up the section with the unit actions. So, would it be possible to do something like this for both promotions and spells? Even if it's something that is "choose this action to expand/collapse the spells/promotions buttons?" and when collapsed nothing but the button "action" to expand it is displayed from that category?