My gut feeling is that with a couple changes this episode would have hung together better-
- Have them take a shuttle instead of the Enterprise. This lowers the stakes for our command crew and simply makes more sense than half the crew (that wasn't on leave) agreeing to steal a ship. It also means they need to figure out a different way to deal with the fake Federation ship at the end of the episode is some way other than 'shoot it with bigger guns'
- Have Chapel and M'Benga do something within their character strengths to escape instead of magic drug that lets them hand-to-hand fight their way through a dozen or more Klingons.
That said, there were a lot of things I DID like about the episode, including the Klingon Captain at the end and the new Chief Engineer.