I think you'd be disappointed - the traditionalists I know wouldn't care about what happens in BJJ, they'd say its a different art and they can do whatever they want in BJJ. For that matter, most won't say much if they're visiting other clubs - I've had traditionalists who I know only allow white visit my dojo, and at least while on the mats they kept their opinion to themselves ... perhaps because the tradition that the sensei gets to set the rules is an even stronger one than the white gi one (and actually the traditional gi's were a kind of tan anyway, as gi's weren't bleached white back then).
BTW, I agree with you on the gi color, it doesn't matter. In my dojo folks can wear whatever color (or combos like white pants-blue top) they want, so long as its CLEAN. A dirty gi means you get to go home and put it in the wash.
Have you ever seen pictures of Jimmy Pedro Jr's dojo? American, world champ and Olympic medalists ... he's got black and yellow (sort of looks like bumblebee's to my mind) gi's for the kids. Pretty sure he insists they keep them clean too though