This is how optionselects pretty much always work, in all games: If you can do them, then you always do them.
An example, You can either do a 5D with no chance to throwbreak, or you can do a 5D with a chance to throwbreak. Take your pick.
also, this is the combo thread.
edit: also, I'm not sure I would call that an OS since you aren't thinking, "oh, he might throw me, so I'll OS between a throwbreak and a drive-counter." Since the idea of an OS is that all the possible outcomes workout in your favor, or are atleast better then not OSing at all. But like, ok you OS a throwbreak with a drive-counter, so you either break the throw, or you randomly d-coutner something, or you get hella punished. It's better to not use this 'OS' at all or OS a throwbreak with a barrier.
This isn't so much an option-select as it is a superior way of doing the d-coutners.
more edits: also, I like to call this stuff throwbreak-install.