I thought Lewis's skill set was comparable to Sefo's.
Doesn't have a cannon, but can make the college throws. Not a burner or jitterbug, but can extend some plays and get you some 1st downs & chunk plays with his legs. Doesn't have elite accuracy, but good enough to be successful in college with some work on mechanics (footwork & consistent delivery motion).
Seeing the field, pre snap reads, getting quickly through progressions, mechanics/footwork, and being decisive with the ball were the sum of the issues, imo. Those are things you'd think coaching could improve.
He has some moxie and is an absolute bull (iirc, he set a CU program freshman record on squats)