Considering the topic of the OP.
To see where the KPA should develop further, at first we need to point out where KPA still holds back against its main rivals: AxeFx and Helix. There are three main points of comparison: sound, software and hardware.
- Considering sound – there's no apparent winner, as it's subjective and people still can't agree which unit sounds the best. But Kemper does not have synth simulation and AxeFx does.
- Considering software – KPA loses to AxeFx and Helix, as it lacks parallel signal chains (though there are I/O for at least two parallel signal chains).
- Considering hardware – Kemper loses to AxeFx and Helix, as it lacks routing options and built-in USB audio interface (which is also a software capability).
So, to fully get up to AxeFx and Helix, KPA must have at least parallel signal chains, more routing options, have polyphonic synth simulation, USB audio interface, enough processing power to support all that, and maybe profiling not only amps, but also effects and, if possible, mics (may be possible with launch of the Kemper Kone, which can be used as a reference speaker).
But, the main thing that every guitarist looks for – is the sound that inspires to play music and it should not matter what tubes were involved, how many gain stages, how many pedals in front, what combination of speakers, etc. And so the main product every guitarist wants is NOT a tube amp, solid state amp, digital amp or pedals. It is the sound itself, not the gear. But, a lot of people miss that point and want a feature for profiling the whole amp (with tone stack) or overdrive pedals. Those people are looking for a gear, but what they really need – is the sound. And they start to have misunderstanding KPA's main conception – a profiling guitar amplifier with onboard effects ("profiling" means – "don't care about hardware"). KPA's hardware interface states that it is a guitar amp: it has standard gain, tone stack and effect knobs, and a profiling mode. Software interface states that it is abstract amp: amp settings do not have anything about types of tubes or gain stages, but there's "Definition", "Clarity", "Tube Shape", "Tube Bias"; cabinet settings do not have speaker size, cab size or mic placement, but there's "Character", "Low Shift", "High Shift" and "Pure Cab". All those settings describe sound, and not the gear. And that is the main point of the KPA itself – abstract from gear and work with the sound itself.
And so we have the product that serves the main single purpose – being an abstract guitar amplifier, but the changes, that a lot of people want, would place such unit closer to a multi effect processor and thus at the same category as AxeFx and Helix.
At this point there is no clear answer to the OP's question, as people still do not know what they really need (probably never will, as newer guitarists are born every day ) and for Kemper it is hard to lead every lost soul. So maybe someday KPA-II will fully surpass AxeFx-IV...