Regarding the 'duplicate the entirety of WoW's memory and screen buffers' is a little thrown out of proportion. It took me a week or so to reverse engineer Warden enough to emulate it on the packet level. Anyone with the time and x86 assembly know-how can achieve the same.
Though, regarding your last comment; running a Blizzard certified module is the only logical and safe route to take if someone were to actually implement this. Nice work though, but finding people whom are willing to constantly maintain an anticheat, free of charge will be one of the tougher tasks.
PS: You still have a few opcodes and scans left to reverse