What a beautiful episode. The message was great and it wasn't ambiguous enough for people to really misinterpret or miss it while still remaining an indirect allegory for current times. The allegory was clearly about either homosexuality or undocumented immigrants and I appreciate that people from either group can likely relate to this episode. As a gay guy I have to say I definitely did.
Also, the scene with Spock's "outburst" was hilarious and I loved seeing the (on the surface) emotionless Spock once again.
Overall I loved the episode and I'm very glad to see one I love after personally disliking the previous one.