Just this.
I had uploaded this image originally in the "gripes"-thread, - I think - but I felt like I cared enough to suggest this improvement, as to give it its own thread, instead of having it just sit in one of the "shouting into the void"-threads.
This improvement would make it so, that players would always able to see right away, during each turn, which of their powers are off cooldown. It also significantly speeds up combat by demanding one less button click per turn.
Feedback is welcome!