I wonder if there are some queues they could take away from the Ralph Lauren model...they have a handful of very different lines both in quality of build and style, you can find a RL polo on the rack at Macy's, but also pick up a RLPL camel hair coat for $15K...no one seems to really turn there nose down at Ralph Lauren the brand despite
Put a handful of B&Ms in the right areas that sell mainline and upscale pieces, diffuse a decent amount of the lower level and mainline stuff to 3rd party vendors, and make some unapologetically high end, high price stuff
I think the difference is that RL chose this model from a position of power, and BB is trying to crawl out of a PR nightmare
I personally find that the difference between BB and RL is the latter makes trendy takes of classic clothes (ivy or western) cheaply and that translates to the prices.
I would imagine they'd have a lot more custom if they would ignore their "core demographic" of moaning traditionalists who don't spend any money anyway and do a black label again at mainline price.