I didn't like the Episode either. I thought it was very strange that a person(Burnham) so good at Vulcan martial arts would suddenly become so useless at fighting. I could possibly believe that Saru is much stronger than he appears, but, if that's the case, why did it take 3 or 4 blows to break the connection to the transmitter? It has lots of little things like this that break the whole show for me. For example, Saru's ability to sense death and danger, yet died 50+ times in the previous episode and didn't feel anything, he even recommended bringing that space whale onboard.