The issue ive heard with non-Latin mass is that it has lessened the feeling of global community among Catholics as they now do not all speak the same language (Latin).
Anecdatum, but I still feel like part of a community when I go to Mass in a language I'm not familiar with, because its rhythm and flow are the same more or less everywhere.
Disclaimer: I'm definitely not old enough to predate vatican 2, so I'm not from a time when Latin Mass was widespread.
