If I should ever want a multi timbral powerhouse from Dave, I'd opt for something like this:
32 voices (all should be playable in any configuration, from 32 individual to one 32 voice polyphonic preset)
The voice architecture should be a "One Voice to Rule them All!" ... the architecture taken from the Evolver, where you have two analog oscillators (taken from the REV2 to keep cost down), and two digital (taken from the P12). Add the option to include sample oscillators on the two digital oscillators... Keep it mono instead of the Evolvers stereo configuration to further keep cost down (and polyphony up!).
Now D/A convert the digital oscillators, and mix them with the analog ones, and throw them thru a multimode VCF (HP/LP/BP etc.) and into a VCA...
In parallel, put the usual FX section of the REV2/P6/OB6 (this is on all voices of course, not per voice) ... this may need more than one FX engine... probably more like 4 to 8, and all working with sends from all the voices.
Summa Summarum, I'd like to see a "super voice" containing all that Dave has made in analog and digital, with added sampling functionality... the "One Voice to Rule Them All!" ... then this "voice" could go into different instruments... maybe even a multi timbral one that you can put as many "voice boards" into that you want... say, 32 slots, and you can have anything from one to 32 "super voice cards" in it, and use them one by itself, or in groups for polyphony. This would give people a chance at buying them without breaking their wallet.
He could name it "Sawron!" ... or something...