not sure why you think oviedo is finished, hes done well when called upon. In fact as a backup left back hes been really good. Never moans, gets on with it and always puts in a good shift and creates chances too.
I'm pretty sure his last appearance was when he was terrible in that debacle at Chelsea and got subbed in the first half? So I don't think you can be sure he's not finished (at Everton, anyway).