You forgot Aaron Williams, Torrell Troup, Alex Carrington, and Kelvin Sheppard. All 2nd or 3rd round picks, none of which are above average starters. Carrington gets rotational time and blocks kicks, but none of the other 3 play a majority of snaps. And in the case of the IR'd Troup, if he comes back, he's behind the aforementioned Carrington along with K. Williams and Dareus at DT.
You've got to pull starters from the 2nd and 3rd and Nix hasn't done enough of it in only his first two drafts. Glenn may be the exception but it's too early to tell. Regardless, they're not getting value to fill holes let alone build depth.