I don't know about putting a "bear" mod onto boards that have a "bull" mod... I can envision ibox modification wars and delete/reinstate/delete again/reinstate again problems with two competing forces. (seen it happen).
I would suggest that if Admin thinks a mod is too pro or con a stock, then someone neutral should be added, not an opposing force. Better yet, it could be a mod squad function to keep an eye out when Admin notices such a situation.
But I'll just butt out since this isn't my website.