When your shifter hits level 35 and only has their final forms left to gain...make them visible. Then you can delete if they are bad or continue if they are good. This saves you the time it takes to rank up to 42-49 and then hero if you can get enough edge points to spin or roll.

After all, if you'll delete at 35 over your forms, you'll delete at 42-49 over them. It just saves you about 50 hours of time because you don't know yet. And, since you have to get to 35 to see them, you're likely to take a decent (not crappy) form rather than delete.

Plenty of people delete over bad forms. It's a thing. Some may never do that. This would not affect them at all.