In my mind, the PL is more about learning the game and tactics, as opposed to competition.
So yer sometimes you might find that you go out and buy an awesome player which puts you above the threshold, and for the real game, you play that high salary team, and you want to play that team in PL so u can learn with them, but its just a courtesy thing really.
I dont people would be in the practice of 'bending the rules' so that you can win a PL. Its more for the benefit of playing against different teams with your current roster, trying different tactics, players in different positions without fear of injury, training minutes etc etc etc.
if someone ends up just playing scrubs, then yer ok that happens. if someone goes and buys an awesome player, it would be NICE if they didnt play their full salaried team int he PL, unless maybe by prior arrangement with the next opposition.
In my mind, its not really about who finishes first in the league, or competitiveness... more just about learning how the play the game better. :)
doesnt have to be perfect, just more accessable and tactically meaningful for us Div II and Div III teams who arent walking BB encyclopedia's yet.