Orton may be average but he is the same thing he was while he was here...The best option. Tebow is not going to amount to anything at the QB position. So him being just average is better than the other two who, as of right now, can't stack up.
While he was here it was the same damn thing, everybody wanted Grossman, until he came in, fumbled, threw picks, over/under threw everybody and their mother until we boo'd hiss ass off the field and guess who was back...Orton.