While I love the potential of what Willis could become, I am terrified of what he will actually be. Sure, he could be our Josh Allen or Deshaun Watson. He could be that mobile QB with a big arm, who can make all the throws, and extend plays with his mobility. But if history is any judge, given the number of QBs who have the raw talent and don't ever turn it into anything great, it's more likely he'll be a bust. He'll become our Daunte Culpepper at best and Tavaris Jackson, Jason Campbell or Andre Ware at worst.
Every scouting report I read and every highlight video I watch showcases the two major problems in Willis' game, accuracy issues and decision making. Looking at this stats, his QBR and completion % went down from his 3rd to 4th year. He had a higher passer rating and completion % than Allen did at Wyoming, but their offenses and situations were different. Again, going back to the Allen comparison, for every Josh Allen who turns it around, there are dozens who never develop into anything special.
If I am the Lions and have the chance to draft one of Bryce Young or CJ Stroud next season, I'm passing on a QB this year and that includes Willis, enticing as it may be.