My only concern with Lewis is that he's only proven himself for 1 year as a starting CB. With that being said, the FO has had a strong track record on deciding whether to sign a player or let them walk.
IMO, I think Lewis and Cortez Allen will be the #1 and #2 CBs on this team for years to come.
Lewis had a good year last year in a different role. It's all about confidence and Lewis has gained it. He is going to hit his stride over the next two years in his prime at 26.