I hear what you are saying about not liking the shorter times as far as SRS goes and I understand. If anything, maybe they could round up to next hour instead of backwards? Otherwise you will just have to keep track of it yourself I guess.
I AM a fan, however, of grouping them together in one hour versus every 15 minutes. If you are like me and obsessively check your review queue throughout the day only to find 2 or 3 reviews at a time every 15-30 minutes, this will be very helpful I think. I would rather just do them in larger chunks (not 100+ but maybe 20-30) at a time. I feel more accomplished that way I guess…

