Waiting for the stable 1.0 version (i've a very large database of quite 1TB data

) i've some questions:
- i shoot RAW + JPEG: how these files will be considered by the new Photo app ? One only file or 2 ?
- there'll be always the choice to downgrade (months by months ?) from a larger plans to smaller one ?
- leaving the full version of each photo in iCloud and the smaller one on desktop what happens when want to edit a photo ? Photo app automagically download the full version on desktop ? Or we can edit only the smaller one on desktop and then automagically the editing will be upload to iCloud and applied to the full version ?
1TB can be not enough: any news about larger plans (hope also Apple will release better price ...).
Frankly i'm disappointing that Apple not creates a BACKUP of our iCloud photo library: i really hope Apple can add this important feature ASAP.