As you can see, I learned a lot of Latin (and some of my basic outlook on life) from MAD Magazine. And it pretty much reflects how I feel about the Motu Propio--nice for those who want to hear the Mass in Latin again, but I don't worry that it'll turn the tide from the vernacular Mass by a long shot.
Anyhoo, please carry one the arguments in threads below (I think it says in the Catechism that you're not Catholic if you don't argue), but I thought it might be interesting to get some quick responses to this fill-in-the-blank statement:
"The WORST thing about giving parishes more freedom to choose the Latin Mass is [your thoughts here in no more than three lines, please.]
My guess is that the worst that can happen just isn't really that bad.