To everybody,
Though I am not into pharmacy, I'd like to share a few thoughts.
Major decisions at NABP are primarily driven by Boards of Pharmacy of different states. For you to be a pharmacist in a certain state, most State Boards recognize NAPLEX as a standard, but it is not imperative that they actually do. For example, if my info is correct, California does not require Naplex and that they have their own exam (atleast until recently).
My point is that if you want to influence NABP in changing the requirements from 5 year to 4 year degree (or accept 4 Year+Masters), you should also be contacting Pharmacy Board Directors of your respective states, express you problem and seek their help.