He's a stud and might be the #1 CB in the 2019 draft. HOWEVER, LSU is a mess at corner. They return 3 CBs, including him, that's it (a 4th K. Fulton is suspended for cheating on a NCAA drug test).
They added a grad transfer from Stanford who is mediocre, and flipped a WR to CB. They were counting on Surtain to come in and start this year.
So yes, Williams is awesome and probably will limit Richards. But their other CBs can be had. Whether Rosier can complete the throws is obviously a question, but we'll have WRs getting open against them