PRO: The sick parents who can't/won't move, a spouse with cancer who needs to live next to the best treatment you can afford in a non-Delta base city, or the same for progeny is probably the best argument I've ever seen for a better commuting policy.
CON: My guess is the vast majority of pilots who commute do it for lifestyle reasons. IE:
"I want to live next to the mountains (ski); water (I sail); no-taxes (f-yeah); Idaho/Montana (My militia)" etc.
Commuter policies are an inherently divisive issue. Definitely fight for what you want, but there will never, ever be consensus.