Yeah, that's a really nice tidbit. Instead of just "OMG, Nunnally laughs around you, u r awesum nao *cheeeeeese*", it's "Oh thank god, Nunnally isn't batshit crazy when she's around you. You're actually healing her, and that's something that I can't thank you enough for."

In general, I like the novel rendition of most events a bit more, with Genbu's characterization and Suzaku's lolwut premeditated murder of Genbu pretty much the only prominent exception so far.