Exactly. The 75 is as revered as it is because of its wing and engines and that's it. Its tube isn't anything special at all. The only reason a re-winged and re-engined 757 would make sense to anyone its because BA could save some money keeping the same POS tube yet still have to do the lion's share of the R&D for the harder and more expensive parts of it anyway, and then when they're done they'd still be half a step behind.

IOW its hardly the pent up panacea many are nostalgically pining over.