IMO, the only thing that could possibly need tweaking is playoffs qulification, the ranking/scoring system is fine as it is.
@Yanme, you'll get enough points if you win ropers/rr's against players with high rank. Use analyzer - it's there for a reason. It's impossible to have a system that would fit perfectly for all players in all situations. And I repeated myself many times before and I'll repeat again: reseting statistics makes
no sense in a rating based system. Ratings have the purpose to represent someone's skill over longer period of time. You win amount of points that suits your skill - you don't become begginer again just because your points gets reseted, right?
Correct me if I misunderstood your proposition, cheers