Setting aside the fact that the armor rules are quite clunky, such as heavy armor being crippling and the clumsy armor trait being superfluous, the clumsy armor trait could use clearer wording.
I have seen many, many players in my playtest groups jump to the erroneous conclusion that the clumsy trait caps your total Reflex saving throw bonus and your total Dexterity-based ability check and skill check modifiers. If Paizo intends on keeping the clumsy armor trait, then they should at least tidy up this wording to prevent confusion.