Smith will provide the push from TE at the line of scrimmage. We no longer need a player like Davis, and Smith is younger, cheaper and went through camp with us.
As an aside, I really do like Smith. Just think about the odds he beat. He came to a team that was over crowded at TE and competed against an All pro, a fresh second round pick with terrific hands, a 6th round surprise who is oozing with athleticism, and a free agent pick-up who is a special teams ace and the pet of the special teams coach.
Smith made a team with all of that cut some player they liked in order to keep a 5th (five!) tight ends. He must've been beyond solid.
Kudos to him.