Fair enough, but you can't transplant one system from an entirely different culture and expect it to work.
Put simply, B teams would not work in England and the only people who want them are the people who they would benefit the most...
It would make competition in the lower leagues extremely unfair.
Oh and it would tarnish the history of the 'feeder' team and belittle their standing as an individual outfit, which is what every single football team should be. In this country at least.
B teams are a no for me. Not in our league system.