You are right
The EMC use some strange algorithms in the conversion, because have to translate from one source to the destination source format and not the all keyboard will use the same Tracks/patterns.

The best way is make how our Styles T2 to MS Extractor ( and NOT converter) will extract the all patterns NOTE ony to every single midifiles track.
in this way we can have the Real Note line of every patterns, included May, Min, 7th, 7thDim.
16 pattern for 4 chords variation, total 64 Midifiles for one style.( 16X4=64)

The Mediastation arranger right now is able to load/play the all EMC Exported midifile to Seq format and the all single midifiles for each pattern and chords.

After the Note to midifiles export we have only to remap the sounds/volume/chorus/reverb... in the MS arranger editor BUT we don't lose any melodic line of the pattern.
This DO NOT mean that the MS will sounds same like the T2 styles, because we have a different sounds palette to setup.

If the Wersi is working in this way too, then they really choose the right way.
The Wersi arranger in this system can really sounds like the T2 too.

Pity only that the all others embedded brands will not open the system like us and offer you a new advanced open arranger.