I have a theory that Neal needs to be crossed-over with every crime-fighting team in fiction, and this wouldn't have occurred to me, because, obviously, Sherlock is not going to take much of an interest in White Collar fraud and art theft and whatnot, but this is utterly utterly perfect. Usually the crossover appeals to me because of how incorrigible Neal is, and the prospect of new people having to deal with him, but in this case, of course, the charm is how impossible Sherlock is, and how everyone just rolls with that.