This sounds so elitist tbh. Who says PSL should be reserved for the select few? "Random" teams can and should play comp too. I personally would like to see up and coming teams battle it out rather than the same old faces.
Besides, the "good teams" from before are largely inactive as you said. That's even more reason to include new blood in these kinds of events. Otherwise, I doubt you'd have enough people for PSL Teams lmao