Yes, it has been an interesting period! The transition from strong El Nino to La Nina is typical, whereas the opposite transition is not as common. This relates to the asymmetry between El Nino and La Nina that I discussed a few years ago. 

Also, I agree that it is interesting how we have not been seeing prolonged neutral periods lately. Because ENSO has so much natural variability, we need really long periods (or lots of reliable model simulations) to determine whether any trends are significant. However, see this post for an argument that we have seen a trend in these big swings from El Nino to La Nina and vice versa over the past century.