…would 079 even actually recognize 076-2, here? Keep in mind that 079 didn't have any cameras or even a microphone when it was stuck in the Exidy Sorcerer, so it would be entirely reliant on speech patterns to recognize anyone, and 076 isn't acting like himself, but rather like Bright Shaw everyone's favorite(?) monkey boy.
Also, if 079 is in 2000's control system, then that means it has access to the BZHR (or would that be SZHR?) units, as well as the hypnotherapy systems, so there's really no reason it shouldn't have access to an army of brainwashed clones by now.
Also also, another quibble that ALWAYS gets me: SCP-2000 is NOT like sticking 055 in 579, or some other instant reset switch. When you 'activate' SCP-2000, all that happens is that it automatically clones a cadre of O5s and Senior Staff and 2000's own maintenance crew, and then said individuals get to work rebuilding the world the hard way.