Lost comm procedures should not include changing the transponder code?
The argument that the Legacy didn't loose radios, that is why they didn't change the transponder code, does not make any sense to me. A radio that does not have a 2-way communication, is not a "functional" equipment. If you call, and have no answer, to me this is a non working radio. The fact that the Legacy' pilots could hear radio "chats", but could not establish a 2-way communication, for me is enough to change to "lost radio" transponder code.