Latin, my friend, is only the official language of the Latin Church.
We Eastern Catholics have never used Latin and never will. Why not make Catholic children learn Byzantine Greek, Church Slavonic, Syriac, Ge'ez,etc.? (tongue-in-cheek)
Obviously we are talking about the Roman Catholic Latin Rite here...no offense meant to the other Rites which have probably weathered the post consiliar age better.
Latin is very useful outside the church as well. Its strict rules of grammar help students learn English better, not to mention that it enlarges their vocabulary.
Now yes, I wish my Greek were more solid -- I think it is easier to learn Greek once you have learned Latin though.
I think requiring Old Slavonic would be a good thing.