Rabea's clip sounds great to me, better than previous clip.. But that's not surprising. Drawing conclusions (or even strong inductions) from a single clip of someone playing through a unit, at least like the video posted earlier, is certainly premature. There's tests on youtube with kemper against axe fx where axe uses similar IR all throughout some high gain amp sims -- and people who dislike this cab/mic sound be thinking that "well this is how Fractal sounds; kemper has much more variety.. I can hear the same character in all the Axe clips!".
Yea, Sherlock. If you put the same or nearly the same IR over a few (relatively) similar sounding amp tones, what do you expect will happen? What do you think would happen to the end-sound of direct kemper profiles of the real amps?
On which end: yes, some will dial in the amp modelling of Cortex to sound better to many... then people will also use different IRs, eventually... and some will emulate different source tones using the capture function. Point being: Cortex will have a lot to prove certainly. But it makes sense to think about what a given test, illustration, demo, whatever, shows or doesn't show -- what observations can be reasonably made.