Live and learn,
Sounds like you have lived it and learned it..Everything scenario you came up with is true..It's going to take alot of dancing to make it work..As far as the five players from each team..that was just to point out that some age groups could benefit from it..It's not to say that it would happen.
If you are not finding out things at tryouts..Are you asking the right people? Going to tryouts lets you know who is interested and who is not by who shows up..No simple answers..I question people's motives all the time myself but I don't want to throw this thing under the bus before it's had a chance either.
Just trying to be proactive instead of reactive for the girls