I take it as a chastisement. However, another view has been expressed, that while vocations are down from 30 and 50 and maybe even 60 years ago, in a longer view we are closer to normal. In other words, there was an unusually high number of vocations in about that period of the Church.
Some interesting observations: those diocese that are faithful to the Magisterium seem to have significantly more vocations that those which favor dissent. Those parishes where prayer abounds seem to be producing vocations; where prayer is penurious, little or none (i.e. Eucharistic adoration, among other things).
Much has been said about the increase in vocations in the third world. What has been said also, but not heard well, is that while we have our own house to clean (sexual abuse and homosexuality, and in some areas, no clue about the Magisterium), they, too, have issues which could cause serious problems; they need to be certain that men are not coming forward to be ordained because of prestige, or an anwer to poverty, or a means of education. In the short term, it is going to pinch. In the long term, hopefully the Ark will right itself. The Holy spirit blows where He will.