Having re-read the previous responses, I will say this: The Kemper is an amazing piece of gear - I will be testing it severely during the next two weeks. I frankly don't care what the fanbois think, nor the hopeless critiques - I just want to see what it can do tonally.
You can profile with your HC between the mic/micpreamp and KPA in case you like to get rid of unwanted fizz.
I for myself found that I get about the same fizz as the mic in front of the real amp produces - and that is what I want.
Btw. it's possible to add an EQ block in 'X' in order to get rid of any unwanted fizz or woofy low end.
When my profiles do not sound great - then I try not to fix it later but to choose another microphone or mic position ...