Shaw66 spot on! The FA signees with longer term - Morse and Long have a future here. Spain, Nsekhe, Waddle and Feliciano will be asked to play key roles as starters/key backups this year as well. look for OBD to draft an OT/G and OG/C prospect after the 3rd to develop. IMHO, McDermott, Ducasse, Bodine and Sirles are released at some point. Boettger and Teller will be PS candidates if they can't make roster - which is entirely possible. Sirles signed a vet minimum deal with no signing bonus so no cap impact if released. Minimal dead cap hit if the other guys get cut too. I see Dawkins as only 2018 carryover assured a job this year.
One only needs to look at NE for a template to rotate a mix of young seasoned vets with draft choices to build a consistently strong line. Some years they struggle in early games but get it together by years end. Any OLineman on Bills this year will be learning a new blocking scheme and likely only 1-2 have prior knowledge of Daboll's offense. Next yera will be a little easier.