I'm confused. MTS is quite exhaustive on MIDI 1.0. How is microtonality in 1.0 a hack compared to what's being provided in 2.0? There are obviously a number

I'm confused. MTS is quite exhaustive on MIDI 1.0. How is microtonality in 1.0 a hack compared to what's being provided in 2.0? There are obviously a number of 2.0 features that are much more advanced than 1.0 (MIDI is primitive). But MTS is actually pretty good and not a hack.