I feel it hid to much information just to be able to give a twist in the end
I don't think it was much of a twist. Between the doctor's actions in The Broken Circle (using the protocol 12 combat enhancer to fight his way through a ship of Klingons with Nurse Chapel, as recapped at the start of the show), the Special Ops Andorian trying to recruit him to the mission (and the doctor declaring that his days of doing such things were behind him), the re-introduction of the P12 green vial, and the repeated aggressive physical contact between M'Benga and Dah'Ruk, it was pretty well spelled out for us before the end of the episode.