Well there would be the warranty issues when the headstocks started breaking.
Sounds like we're almost back to the one Gibson DID make in 2012!
None of the Custom Shop TBirds I have seen ever went back to 60ies specs. The one exception is Phil Jones' Korinabird he built from a discarded Francis Buchholz project. But that was more a love child of his (he built it for himself) rather than regular CS fare.