They've kept 5 the last few years so doubtful they go to 6. Add to that we have two good pass catching TE's when healthy and believe we led the league in times with 6 OL on field. Think if Kincaid had been healthy would have seen more 2 TE's sets last year. Plus they signed this guy yesterday not even going to try and spell his name who likely was signed more as a returner, but can also play WR. Think he may provide more as a WR than Coddington provides as CB so think he could stick on 53. Maybe Coddington will also stick if improves his coverage skills some as a backup CB.
I think they draft a WR mid round to take Samuels place next year. The Bills were one of the top 10 offenses in the league last year, Palmer does fill one need they had at WR to better stretch the field. When you have a QB like Allen, you don't need all pro WR's on the team. There are always vets cut in September, if someone were to get hurt, could sign someone at that point. But without an injury, don't see a roster spot for anyone else but a draft pick