You wrote,
I agree Hilton is best in the slot, but by saying he could be the reason Burns or Sutton are on the bench, it implies he's taking either's outside cornerback jobs. At least that's one way to interpret it.
My next sentence then said Burns and Sutton will be in direct competition. Meaning Hilton probably has nickel locked so Burns or Sutton will likely be odd man out.
I expect lots of exotic coverages this year to try to find playing time for the guys left out.
For simplicity, i'll assume Burns is starter. That would mean Burns, Haden, Hilton, Burnett, Davis are your starters in nickel
That leaves Sutton, Edmunds and Marcus Allen on the bench. Quite a bit of talent to do nothing.
I can see each of those 3 playing in different dime packages depending on situiation
Sutton - extra coverage against a pass heavy team or long situations
Edmunds - more athleticism against a team with a good receiving back or a good 2nd TE
Marcus Allen - if you want more of a run stuffer. Maybe you play him at MLB with 0 LBs. 7 DBs and Watt, Heyward, Tuitt, and Dupree playing DL