I know players who open 10 different accounts side by side, and redeem as many boxes as they can, because the redeem codes have a limited quantity set on them. Changing the release hours, or validation per account, wouldn't really matter to them. Changing release hours could matter to others; pushing it back 4 hours could make it 12 AM for you, but 4 AM for someone else.
There are always workarounds to the solutions mentioned, and people would do a LOT to get the bundles, and sell them for gold when they have multiple.
I know all I'm doing is looking at the negatives. I just can't think of a working solution myself. I believe that if anyone had a solution, Kathleen would change it for the better in a heartbeat (or a few).