While I favor married clergy--I don't think allowing for married clergy to solve the vocations crunch is the right reason to do so. 

I believe the vocations crunch is due to a far larger problem in the Church: people have largely abandoned (practically speaking) a Catholic culture and their Catholic Faith.  In other words they are too influenced by secularism.  Church is something done on Sunday's if at all.  Faith is not who a person is, it is not a way of life, it is what one does when one has time, if one feels like it.  The commandments are taken as mere suggestions.  A person's image of Jesus is something analogous to a hippie, a nice guy, Santa Clause, a social justice warrior, Karl Marx, all rolled into one.  Church teaching can be summarily dismissed when one does not like what the teaching says--except of course when the Church talks about helping the poor or using green technology.

Until that problem is addressed, I don't think a married clergy is going to solve anything.