This is not to say that the MESes are unproblematic. To mention just two points not already mentioned: none of the "new" math characters are included even in MES-3 (a, b), despite that "all" math characters were supposed to be included
That isn't true.
and not even MES-3 covers all official minority languages.
What's missing?
(But as Philippe states, there are some rather useless characters that have been included for compatibility reasons.)
Same goes for Unicode though. :-) -- Michael Everson * * Everson Typography * * http://www.evertype.com