I think you are right, but I think RS has been focused on low-knowledge sales focused on training staff on narrow canned feature/function/benefit of particular products on the shelves and redirecting consumers in line with centrally-set incentives, with line management largely themselves developed through the same process, for so long -- decades -- that its been a long time since RadioShack could be practically turned around in that way, short of selling the name (presuming there is goodwill attached to be worth even that) to a different company with a completely different top-to-bottom culture.

I think a brick-and-mortar boutique electronics retail chain could work on that model, but I think it'd be easier at this point (or any time in the last decade or longer) to grow it from scratch than to turn RadioShack into it.