Since the chosen voting website doesn’t allow to change your vote, I would suggest to everybody to take their time during 2 weeks to read properly the 7 PEPs, exchange their opinion (ex: in Straw poll: Which governance proposals do you like best? thread), and only vote just before the deadline 
Or would you prefer to deny modifying PEPs anymore, have a 2 weeks period to review PEPs and discuss them, and 1 week to vote?
If it becomes very obvious just before the vote that we missed a better governance, it would still be time to cancel the vote. I’m not sure about allowing again to modify PEPs to take in account the feedback. It’s unclear if the feedback loop has a stop condition (Halting problem - Wikipedia)
I’m thinking aloud to try to understand what you mean, but I am fine with the current PEP 8001