To this point I have assumed Ramsey and Hill mainly will man the outside with Williams in the slot. I like Long a lot but have also assumed he's really a pure outside corner. Maybe I'm wrong. But thinking more about it maybe he could still win the nickel job but simply play outside in those sets (with Hill sliding inside or Ramsey- who will follow opponents' WR1- going inside sometimes).
Regardless I think all four CBs will have roles and they will figure out how to get Long snaps. They need him to become a starter in 2021 so he needs consistent work this year.