All true, but look at what Carson Palmer and Big Ben are doing. There are risks sometimes worth taking. I would still keep Plummer for a year, maybe two, while a young QB learns the NFL. Plus Shanahan is a good QB teacher, Plummer showed tremendous improvement this year but he fails in the big games.
Dallas get Young? Interesting, but I think Houston may take Young first. Ah, who knows! There could be some major trades come draft day. :shrug
The Steelers played a tremendous game, no doubt. But Plummer forced too many plays when he had open targets, hence his INTs. Just like his old days, which aren't that old btw.