Such a shame and makes no sense, everything is there in this synth but stretching a sample over 5 octaves kind of kills it for me. If this was implemented in an update, just a simple ability to add say a sample every 3rd key would be enough.
You lose all the attack of samples when you go down pitch wise and you gain a whole load of aliasing when you go up, staring at my Akai S700 that does multi sampling from the 80's
The audio engine on this synth is really good as is the GUI/file structure. Multi sample import or just Soundfont import/Akai import would add so much to this.