Commander is possibly the most successful format in magic right now in no small part due to the efforts of the council they have and that fact that WOTC was willing to both support the effort as well as well as legitimize the format. In turn WOTC was rewarded with a format that now moves cardboard for them with probably less involvement than the management of their less profitable ventures like brawl.
Based on every B&R ever, what makes you think Vintage players would have enough consensus for a mission statement? Consensus on members? Consensus on anything, really?
Consensus may not be the correct word, because I in no way mean that we get a unanimous or even a true majority to agree on everything. That does not even happen in Commander and not every issue is a binary. A representative plurality with transparency would probably be better than what we have right now.
It's a largely casual format whose banned list and "mission" is enforced by individual play groups, producing a flexible format that appeals to a wide player base
Is it really though? WOTC makes product directly for it with that rules set in mind, there are large events for it all the time that while "unsanctioned" in that they are not point accumulating matches, they basically follow every sanctioning rule including adherence to the BR list, DCI numbers, Floor rules, no proxies, etc.