The problem with all these feature requests, that was not even part of the design philosophy for the Prophet X on launch is that the UI is more or less tailored to the engine... if you were to implement all these extra features, many parameters would be burried in complex screen menus and completely drain the otherwise logical layout of the synth... also many requests simply defeat with the design philosophy being contradictory to things already there, or worse; destroying backward compatibility... many people who ask for features have no clue to what it takes programming wise to implement them, a lot think it's just a "simple matter of changing a bit of code" when it is often even a hardware restraint... just look at how many times people on the REV2 feature request list is asking for "seperate volume control of the two oscillators" when that is a hardware restraint... the Curtis chip has a hardwired oscillator mix CV input, and no way to change it at all...
This is why I'm saying; FORGET IT! ... all that sample-engine talk that are in this thread, even if it would be heavenly cool to implement, might not even be possible for several reasons both hardware and software... on top of that, so huge features would require extra time and effort to make, and on top of this it may not even follow design philosophy and further complicate the UI with added parameters...
It would be cool if SCI did it... but given my past many years of experience with SCI bug fixing and feature implementation I can say straight away, that it will not happen... it would be easier making a stone cry
besides... if they really DID implement a sample engine feature that someone has you'd have 10 users wanting more after that, and several of the things they'd want would probably even contradict each other in many ways... it would simply go on and on and on forever.
Another thing you should think about is, that the more features implemented, the more potential for more bugs being present... there are probably plenty already still needing a fix, and I for one would rather see the current bugs being fixed to 100%, than a continuous stream of feature additions supplying us with more bugs.