What is it about what you do that makes you want MIDI?
The need to transport content to other programs (DAWs and notation programs. The desire to use the best VSTis out there. The requirement to edit (usually simplify) some of the content.
Are there enough MIDI styles now to suit your needs?
One would think 2000 would be enough, but 90% of the styles are musical genres I would never use and the remaining 200 include lots of near-duplicates. The later styles tend to be better than the earlier ones also.
Do you think that more MIDI supertracks is going to be useful for you?
The MIDI supertracks are very good, but limited in range. That's the issue. The company seems to be putting 90% of its efforts into the "walled garden". I would much prefer to see those efforts go into MIDI supertracks, but I may be a minority view.