Being more of a synthesist than a keyboardist, being able to create instruments on this thing is why I bought an Origin. That and the price was right.
I'd love to buy another one, but I'm saving up for more goodies to add to the arsenal. Oh, and thanks for the mention of my templates. I'd add to that, kidharpoon's well made ARP Odyssey instrument is included in my template downloads.
To your point, it would be great to see Origin beefed up to be more like Reaktor in some ways, or my comparison, a fully blown Sonic-Core system, although one of those will run you about $4000 US if I remember right. Maybe an Origin II would be a good idea with more ram and DSPs.
Of course Reaktor is possible because it's PC based, and I'm not sure just how many resources the Origin has available. For that matter, and more importantly, I'm not sure how many resources Arturia has available!
Is it doable in the Little O? I'm very doubtful. However, if PC integration is ever made available, perhaps a user GUI tool could be made for it. Something like that should be entirely possible. Unfortunately, Arturia has a lot of work to do, still needing to produce the ARP 2600 and CS-80 templates. And hopefully, making Prophet V oscillators and filters, as well as Oberheim OSCs and filters! I can never have enough tools, and I'd really love to have these instruments in my Origin.