The people mover does the job it was designed to do, and it does it well. It is too bad it wasnt built out to where the stadiums are now, but expansion is not an option. The best thing would to have a transfer station between the PM and the M1 where you can go from one to the other without having to pay again. A design like this would be mutually beneficial to both trains and make the system very efficiant.
Since the PM already is a downown loop there;s no need to build a new one. Plus people on the M1 wont want to make all those downtown stops that the PM provides.