Before the last change there was already one, "O", which was fine. And "open" was "Enter", which is fine too.

Now we have two redundant, unshifted keys for "open" (O and Enter), and orientation has moved to shift-O, which is less convenient.

I just don't see the logic, especially as I don't use Google Reader on the desktop, because Feedly is so much better for keyboard navigation :-)