I don't know if I agree with that. The team went 7-9 despite injuries to their best running back McAllister, and some of their best players down the stretch (McKenzie, Bush, Grant, and Colston with nagging injuries). I think that a piece here are there and the team staying a bit healthier would net an 11-5 type season.
I don't think we'll see this team turn into a 14-2 type season in one off-season.
I would have added another linebacker (I really want Kawika Mitchell) but I really think the wallet will be stretched thin, especially with Colston, W.Smith, and maybe even Jahri Evans needing extensions.