PR, DarthThor, what do you two thing about Ash Tyler?
As it's now blatantly obvious that Ash Tyler (or who we assume is the real Ash) is a Klingon sleeper agent, but his surgical altering is curious. Is he a really a Klingon and if so, is he Voq? He vanished around the same time Tyler appeared.
Stands to reason they could bring in the and use the Klingon Augment virus story as a means for a Klingon to become very human-like, then surgery (as was noted in the last ep) to turn him into a copy of Starfleet Officer Ash Tyler. Then a memory wipe/implant to top it all off.