One way to improve feedback would be to make 'spin the wheel' and 'roll the bones' cost 0 or 1 EP. Then everyone could reject a form they don't like without having to decide whether it's worth trying to hero without their final major form and accumulating the rest of the EP needed to take another swing at a form.

Then you'd have the stats on every shifter who rejected a form (not just the one's who had the EPs currently needed) and you could look at how many shifters delete soon after using their major (after they switched). Because they might get another form they hate.

Essentially, lowering the cost of these edges would be similar to allowing people to pick a form they don't want but without any coding beyond changing a constant.