Fair (playmaker wise), it should be Jones and Lewis as starters with him moving to slot for nickel.
There is nothing to validate that Lewis should be starting over the other 3.
I posted an extensive review of Brown and Lewis from my study of the all-22 footage from 2017 and 2018.
There was nothing conclusive in regards to Lewis being better than Brown; although, there also was nothing conclusive with regards to Brown being better than Lewis.
Many people claiming Lewis shutdown Kamara but Lewis only played 8 snaps on defense in that game.
It was great to have solid 4th CB to to play Dime against Kamara but that's the extent of it.
Lewis carries himself in a way that makes him appear to fans; however, the other 3 CBs are very talented.
I was a huge fan of Lewis after he was shown standing up to Dez on the All-or-Nothing series.
It's possible that he could become better than Brown but as I said, there is nothing to indicate that Lewis definitely should have been starting over any of the other 3.