>>1211897Bending it back seemed to work, though the profile is still a bit out of true. I'm not sure how it will perform when I test it out for real but it didn't throw the chain running in reverse or with the wheel elevated. I'm currently recovering from an injury so I can't take it out for a while though.
Here's the photo of the splines. I'm not entirely sure what keeps it from slipping off horizontally.