Not saying you have to change everything, but you can adjust within your base system. Its silly not to adjust to special players. Didn't Naz put Julian Love all over the offense last year? Didn't GW put Brodner at WR last year occasionaly when they needed a big play? Pretty sure Lenti threw the ball 20+ times against GW last year becuase the QB could throw, and was hurt that game as well. If your really going to be a great coach in my eyes, you have to adjust.
I totally agree with your logic. Making changes to scheme based on talent makes sense to me. Reality is, however, some coaches just wont. JCA has a winning formula regardless of how special the QB is and they are going to stick with that formula.
Sometimes it just makes sense for the athlete to transfer into a system that will best compliment their skills and allow the college recruiters to see their talent on display. JCA was never going to run a 5 receiver spread for Maddie. He knew that.