Every girl I've ever coached with pitching, has pitched from 40 feet. I have never pitched them from the 'proper' distance for their age. I've never had an issue with that.
They have these new fangled cameras out now that no longer require the antiquated video tape. They take memory cards and are easily uploaded into computers and viewed directly to many newer TV's. Perhaps you've seen them.
As for moving back, my youngest dd just finished up her last 10U season. She went straight to 12/40 without missing a beat. She did tire out quicker than normal. We will see how she progresses.