I doubt or sincerely hope we don't see the inclusion of reason racks etc into kontakt. It's bad enough that Native Instruments forces you to use Guitar Rig to access some cool DSP like Traktors 12 etc, utilizing a far higher CPU footprint.
No offense, but it seems like you are asking for a salami to be egg salad. Kontakt is a sampler with lots of scripting abilities and modulatable FX built in. It is not intended to replace a synthesizer, although with RetroMachines MK2 etc, it has some decent sounds that can be used in a pinch.
If Native Instruments is trying to shoehorn in everything into one bucket, they are trying to do that with Maschine, believe me.
Omnisphere is a far different beast, more akin to a modern day Kurzweil K2000
, in that it may use a lot of sampled waveforms as it's oscillators, but they are merely that. (And it would be really great if you could import your own, which you cannot...).
To me your question is coming off as "why can't my Big Muff
pedal also perform delay and ring shifting?" It really just doesn't make sense. If you want a synthesizer to sound more then lifeless and static, then get a synth, not a sample-playback device. Unless you are really good at scripting etc, which seems like making it do something it wasn't really designed to do.
There are some decent libraries out there that capture different synth's essences, I have tried some out, but I generally tend to use real or soft synths for that type of timbre.
Reaktor etc, is a wonderful and deep deep tool, the U-he/XiLs synths etc are great. There are many, many wonderful soft synths and real synths out there. To try and do everything in Kontakt simply won't happen, nor should.