I thought it was a good effort, my criticism largely mirrors Maurice's - most of the acting and direction was serviceable, yet it was too talky, particularly the long heartfelt conversion in the middle of a crisis and the setup was goofy with the ship having time for a new crew and refit with new torpedo tubes and engines, but no one cleaned out the XO's safe? I think it would have been better if Excalibur had just received a patch job out in the field and was staffed with crew who just been M5'd - then the action could have more naturally progressed from the discovery in the safe and the PSTD story would have fit better if the traumatic event had just happened. Also, i would have liked if the Klingons had an actual purpose to the story.
Another positive, I liked the use of the Beyond costumes, they worked surprisingly well with the TOS sets. However, that a couple of the characters had 09/ID costumes was distracting, I was first thinking that they were supposed to be enlisted, but then that wasn't the case. I also thought the McGuffin prop had a nice TOS design vibe, e even if ultimately it didn't seem to be worth fighting over.