it doesn't have to be all or nothing, all exclusive to the toon or all shared PLs. The problem is that the current grind per character is insanely long, so the problem would be solved if the devs shortened it to a reasonable length. Setting some PLs to be shared and others exclusive toon reduces grind without eliminating an individual progression per character, helping both to maintain the sanity of those who feel saturated by the current situation and to please those who like to feel that each character must have an individual progression.
Let's be honest, the current grind is irrational and should never have existed. Reducing it is a good thing, but it doesn't have to be an all-or-nothing thing.
Personally, I have abandoned all but one of my alts until SSG reverses the current situation of hate and penalty alts. That is reflected in my purchases, yes. Less to buy :P