I do have to disagree a bit with this. Out on the trails the built 4-door Wrangler is the Jeep you mainly see now. My guess is 70+ per cent of JKs and JLs you see wheeling are Unlimiteds. The added wheel base just performs better off road in most situations. There are places where the shorter wheelbase is an advantage (tight turns, extreme breakovers, etc.) but in my experience the added wheelbase usually has the advantage. I think you will see a lot of built 4-door Broncos on the trails in the future. Sure, the 4-door will appeal to the grocery getters - that's where Ford will get the volume sales. I don't see this as diluting the brand.I'm not mad that the 4 door is available, its just that the demographic that buys 4 doors will dilute the brand.Most 4 door buyers are buying them for people movers that will never see offroad, eventually Bronco will end up like the Chevy Blazer.
That said, Bronco will be a brand of its own (starting with adding the Sport) and Ford may someday brand something like the new Blazer in the Bronco family. (This is only my uneducated speculation!) That may "dilute" the brand in some peoples opinion, but I don't think the 4-door will.