I don't know if they're trying to replace him, specifically, I think it's just that none of the guys have proven to be consistently reliable. So, why not bring in more competition with one of our 300 picks?
With that said, I'm hoping someone can grow to be enough of a blocker (Woods or Olgetree) so that we can move on from Mo. There was a time when I thought Mo was going to be great but he has proven that he just is not a ball catcher and is too big and lumbering to have the body control needed to be a good TE. Plus his blocking has regressed as well.
I'm pretty confident that with this new group, they'll look to move or cut Mo, unless Steichen can unlock something in him.