Agreed Woods definitely baled out Orton on some bad throws. I guess useless isn't the right word but I still think great wide receivers are limited without a good enough QB. Linebackers are not
As for Kiko, the defense was better without him but I think a lot of that had to do with Schwartz picking up where Pettine left off and the unit as a whole improving from 2013.
He has made some great catches, yes, but you can't deny that not having a good enough QB greatly limits what a WR can do no matter how good he is. As I mentioned above useless probably isn't the right word but he is definitely limited severely by poor QBs. Kiko is not limited by anyone on defense.