I am also VERY upset about this change. Any one who schedules using ebay posts on the 15 minute increments. The old system on Auctiva gave us an advantage to have more time slots available.
I just posted 10 items every 2 minutes and had to edit the 11th item so I went back to post it at 6:11 (two minutes after the 10th item) but I'M NOT ABLE TO DO THAT NOW!
The old system was great. The new way is confusing like most stuff Auctiva does.