How would that be considered an unfortunate design if you can't do border-less sheet printing on any large format (24" and wider) printer in the aqueous versions?! Epson's won't even do border-less sheet printing. It's the same process for each manufacturer (HP, Canon and Epson) where the sheet method is anchored the same way when feeding and won't allow a border-less print unless you do rolls.
Now, if you have a Pro-1000, that is fine with border-less sheets since it only does sheets. Most desktop photo printers will have the option otherwise (mainly the 13 and 17" versions).