Thanks for the feedback!
Not sure if it was clear but I was proposing that anybody holding the external asset had voting rights over the pool. So all SNX holders could vote on certain parameters of the Aave SNX pool, for example.
That suggestion was really related to bTokens, because it would allow the external community to say whether or not they want their lent tokens to be tagged as borrowed. But I actually think it could be an idea worth exploring for more pool parameters, too.
Tagging @Emilio for his feedback on bTokens!