I like Yamaha a great deal, but this new MX model IMO is grossly overpriced for what it is. This is a "new" synth choc full of ten year old sounds. If I read the info correctly the sound set is from the Motif XS series. At this price there should be XF specific sounds, and a larger screen. I find it hard to justify $1,000 for this when you consider the Korg Kross 88 and the Juno DS 88. Again, I'm a fan of Yamaha (love my MOXF6), but Yammie is really reaching with this model IMO.
Squeak maybe its a way to sell off old parts and stock for Yamaha in a repackage?
also with any synth being you can recreate sounds and edit the perimeters in so many ways you can make so called NEW sounds all the time too.