This has probably been suggested before, apologies if it is too soon for yet another suggesting it.
I think we have all hit a shot and once landed and it stops rolling, or a putt that rolls a bit differently than expected, you wish you could shoot it again. Not to "make the shot" (of course that would be great!), but rather to be able to better figure out what you could have done better.
Enter "Save A Shot."
Even if it were just one shot at a time, or two or three, to be able to save the placement of the ball and the conditions of that single shot on that single hole, and then reload it and take a few more whacks at it would be very cool (IMO at least).