I wouldn't recommend chasing PP. there is really no added benefit from Platinum to PP. honestly, I feel a lot of front desk staff is actually confused by the PP and usually forget the Platinum Arrival Gift (using only happens at the limited service properties). I have had at least three situations this year where the front desk agent has to ask what the code in apparently a section that lists our status on what it means (something about an x code?).
Anyway to sum it up, there is zero extra benefit in my experience. I will say the only exception is when you are international. In those cases like Europe and Asia, I do feel they try to do more for PP.