I don't think Simmons or Ingram is some kind of franchise savior. Simmons is a great fit as a 4 in the modern NBA though because he can guard inside and on the perimeter, rebound, handle the ball like a guard, and score inside. Even if he never develops a reliable jumper, he is still going to be a very valuable player. I see him as a better version of Draymond Green who can create offense on his own much better than Green.
Improved his ability when taking angles to the football
Poised and under control
Nice overall skill set
Might lack some instincts
Talent hasn't always shown through on field
Doesn't have great timed speed
A little inconsistent
Could be a more effective blitzer
Needs to improve reaction skills
Minor durability concerns
Summary: Johnson is a linebacker with a very high upside, but hasn't caught the full attention of NFL scouts quite yet. If he can stay healthy next season, I think he is going to move up draft boards because of his impressive skill set and high upside.
Player Comparison: Jon Beason. Their body frames, physical approach to the game and range are very similar.