Good point, but more labour + extra parts = additional costs. It's a great option for those who want or need to travel extensively with their guitars and don't want them going into the hold. Certainly an option I'd go for in a bolt-on neck.
Why not make it standard in the first place?
For the past two years (since the release of the E5S), Tom has been playing 70's spaced Fodera Dual Coils. As a matter of fact, his long-time signature bass with the closely spaced, bridge-centric dual coils has been here in the shop since October of 2011. Tom has been playing an E5S exclusively since then.
He did, however, want to get back to the Emperor II body shape again and his beloved Ebony FB...but in a bolt-on -- so that he could take the instrument apart for his extensive travels on airplanes.
For Tom's TKS we have added metal inserts into the body so that we could use machine screws (rather than wood screws) to attach the neck so that it can be removed a virtually limitless number of times without stripping the holes. This will not be "standard" on the TKS, but we are calling it the "Traveler Option" and will make it available to others too.
Regards,
Jason