If you want flat use Ableton Live. They've been flat since before flat was cool, and it's a much better DAW IMO.
When setting up really complex sounds and devices, I can't imagine any other approach. How do you represent a device that contains, say, 10 sub-devices? Ableton makes it super clear to setup and inspect.
Unfortunately, it seems like few other companies agree with this approach and spend lots of effort drawing backgrounds and rendering knobs and switches.
I think it's a hold over from the days when to experiment with sounds, you actually did have to go plugging various cables in and playing with knobs.
Both are very good at only somewhat related tasks. But fanboyism always sucks.