Disappointing? How? I've already heard When I Grow Up to be sung non-professionally very well.
The harder thing will be schools having the range of actors to play the parts; high schools will struggle with YOUNG enough actors, and Middle Schools will struggle with old enough. The set and tech needs might also be off putting -- but they are going to make a fortune with this.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.