Yes, there are plot holes and conveniences. The story still knows when to let those be and just focus what works better and far more. Even from the start of the episode with McCoy discussing Kirk, and Kirk later sending out a message to Starfleet while surrounded no less, this episode is one heck of a creative and fun romp.
Adding in the Romulan commander, whose forebearers also share roots with Federation uniform designers since everyone's workin' the go-go boots.
This is an episode TOS needed more of. Tight action, suspense and espionage. and broader themes with some moments of intellectual depth (noting TNG had the level of depth that "The Cage" presented but was whittled down in order for TOS to be greenlit for an actual series at the time... /ramble)
The redress of
Enterprise corridors for Romulan ones is nicely done. One I never really picked up on until 2 viewings ago.
I still like to think Spock might turn if the logical conditions existed. Or if nothing else, introduce slash fix with the go-go dancing Commander whose name can't be pronounced, the deliciousness of Subcommander Tal, and Spock instead of the bland and well-overused Spock/Kirk trope. To coin a phrase: "Fascinating!"
