Is the Vulcan theme (played with the Chinese erhu) inappropriate in the context of a film that takes place in space to portray a foreign alien race?
As a love theme signifying Spock's attachment to his race, it fits.
As the erhu is foreign to Western audiences, to them it works for a "foreign" kind of feel.
But to those familiar with the instrument, its beautiful, but feels really weird.
(then again, maybe Giacchino was parodying the similar physical features between Chinese and Vulcans). lol