This isn't specific to this episode, but more the Balance of Terror and the whole 'never saw a Romulan until then' thing...
I really find it a bit odd that Romulans are presented as so combat-oriented, yet somehow they signed a TREATY with the Federation and 'somehow' their identity was never revealed. To see them presented this way and then reconcile that with 'willing to sign a treaty' one would theorize they had to suffer a significant amount of losses in order to sign that treaty. It really seems strange that they could suffer so many losses and never once was wreckage or a body able to be recovered.
I really find it a bit odd that Romulans are presented as so combat-oriented, yet somehow they signed a TREATY with the Federation and 'somehow' their identity was never revealed. To see them presented this way and then reconcile that with 'willing to sign a treaty' one would theorize they had to suffer a significant amount of losses in order to sign that treaty. It really seems strange that they could suffer so many losses and never once was wreckage or a body able to be recovered.