One thing I like about Modern Family is how they don't make a big deal about two gay characters. Mitchell and Cam's relationship, on a whole, is portrayed no different as Jay and Gloria's and Phil and Claire's; they are loving and committed.
The whole issue over the gay kiss (which was completely blown out of proportion by certain people) is resolved in a tactful, earnest way. Jay starts the round of family affection, giving Mitchell a kiss, before giving a kiss to Claire. While they kiss, off in the background, we also see Mitchell and Cam kiss--no big spectacle or parade, just a smooch from a loving couple.
The rest of the plots were more disparate than usual and aren't clearly defined, although Gloria's voiceover about kisses, sometimes even waiting in the case of Alex, brings everything to a heartwarming conclusion.
Score: 8.9/10