Chanyeol hands down was the best at pronounciation. Like hands down.

Chen's pronounciation....I couldn't understand a lot of what he said. Viet is heavily reliant on accents/tones for words.

You're one accent away from calling your mother a ghost for example.

Suho and Xiumin is kind of tied in pronounciation but they're below Chanyeol, above Chen in that regard.

I am NOT bashing them, EXO-L. These are just observations from my end.

Vietnamese is an extremely hard language to get down, I'll say that as I have struggled with it and still kind of do from time to time.

For what EXO's bringing to the table, I'm giving them a thumbs up. Let's see how the actual performance goes. Looking forward to it. :D