It's pretty straight forward, the abilities section (which you can find by selecting a game in your career then under perfomance) is completely useless right now.

I dont know if this is a bug or what but every single game it shows 0 average casts.

Now I think this might be happening just because you wont use the ability every round so the average will be 0 . If this is the reason I'd suggest showing the full amount of uses of abilities in game, because to me at least it's interesting to see how well I used my abilities.

Although, I think that this isn't the reason because even in spike rush, where I use every single ability as much as I can cuz why not, it shows 0 average casts. Even it is a bug, I still think my previous suggestion is better than the overall average, and better yet, both options together could be really interesting.

Eventhough this is such a minor thing, I hope to see other's opinions about this :)