Just letting anybody who is interested in this thread know that I spoke with Dave Smith at an event in a music training school recently and asked him a question pertaining to this topic.
He replied that there is no way to turn off the semi-tone quantization on the oscillator frequencies and no future plans to do so in any future firmware updates.
He said it was designed that way to keep it in tune, or something along those lines.
*Oh, and another thing he showed off, when you set effects to spring reverb, he smacked the wood side panels and it made an actual spring reverb sound as if a real spring was bouncing around its tank.
**And custom Mono Prophet 6 gig bags are expected to come out in January 2016