A name is tremendously important and it would not be a good idea to jettison the TrueCrypt name.
The fact of the matter is if the original TrueCrypt developers are really and truly "finished" with the project, then within 2 years the Nevada corporation registration will expire and not be renewed, and the current trademark on the name and artwork will expire and not be renewed, and those will be up for grabs.
And if they are NOT and intend to hold on to their trademark and name, for them to defend that trademark and name would be exceedingly difficult for the simple reason that in any court proceedings anywhere, a defendant eventually can force the anonymous Truecrypt developer who is filing the trademark infringement lawsuit to reveal him or herself publically, and then the problem for the now-identified plaintiff becomes how does he prove that he is indeed the SAME anonymous developer as the anonymous developer 6-8 years ago who actually wrote the code and paid for the Nevada corporation filing.
In the meantime TrueCrypt has a name and a brand, no matter whether truecrypt.ch uses it or not. If the "good guys" decide to dump the TrueCrypt name and replace it with TCNext, then that leaves the name Truecrypt floating around out there and what's to stop "We Be Viruses And Stuff Company" from grabbing the name and using it to distribute rootkits?