Ugh, tweeking! I don't know why some say the KPA is 'just like an amp' when it is not. Its a processor, like every other processor in the past. Oh, you have big front knobs like an amp, but that's it. its like every rack since the 80's: Little screen, lots of presets, lots of sub-screens & menus, lots of effects, guitar sounds, but also cabs, etc. The FAE is also the same thing, just more of it.
The only rack I have had 'just like an amp' was in fact a real amp, an ENGL 580 rack and it's counter part, a stereo engl power amp. It had an even smaller window (just numbers) big dials, presets, midi, etc, etc, but no effects of course. But it was the real deal. It was extremely flexible.
The real deal is limited compared to these new PROCESSORS giving us many more options, the only real diff from decades past is they do a much better job sounding great. There were many rack preamps that sounded cool on their own, but you had up to 200 or so options, NOT 1000+!!!
I remember things like the Roland SDX-330... You had 4 buttons really, but every present was great sounding. No stupid video game effects and non-musical crap, just a simple box that does what it is supposed to easily, and all you had to do was nudge the few parameters this way or that way. That's it! Then you play! That is perfection, when the box does everything inside, you do very little outside to be inspired.
When you start talking about 'tweeking' there is more than one:
There is pain in the ass tweeking, such as a foot controller (unless connected to an editor) where you are on the floor pushing stomp buttons.
There is old fashioned, move your rig to the center of the room so as to not bang your guitar into something, grab a chair, squint, hold the 1000 page manual, sit right in front of your rig like you are stuck to it 'I did it since the 80's' tweeking with a small screen, lots of menus, lots of time imagining or drawing out on paper a good idea for a layout, then trying to execute it on the wee little screen.
There is EDITOR tweeking, where you keep your rig and stuff where ever you want it, sit comfortable in front of your BIG monitor and enjoy visually mapping our your setup.
the REAL AMP tweeking is no more than 4 channels, maybe reverb built in, thats it. You walk up, have 9 or so knobs, a few switches, turn this, turn that, done. Period. If you have a setup with rack gear and a real amp, you are basically back to processor tweeking.
Sure, you can get used to any processor if you use it enough and think it is easy. Hell, even the pita Eventide stuff you can get used to flying around the menus. But if you don't have to.... Why would you want to?
Anyway, I like my Kemper. I almost hate any additional crap because it is getting closer to something like all the others. I hope there is a Kemper 2 with an editor, I'd buy that too. Maybe they could do something cool like maybe some diff color face plates not green.
I think all these new products from all the companies are great, keep they working hard to out do each other, I don't wave a flag for anyone I just use what will work best for me.