Maybe so - it's tough to tell from vids but conditions and pitch looked doable to me. As far as other sketch conditions, I'm fine with bailing out if it's beyond my ability and looking for something else. If I'm in trees I definitely get a lot more sketched on long skinnies, but it's doable... just ask your buddy Teleman
Flats, yeah I mean K+G. You know I'm OK going a little slower for having grip and descent ability. But like you I'm not really down with plastic for long K+G. Leather is much more comfy for me.
So again, I can see going to a mid-stiff leather and pins to try to maintain some decent dh control and not be completely horrible for K+G.
I actually don't mind K+G with pins, but some of the really stiff boots can make it uncomfortable for me. Again, compromise.
I know this is probably not your preference, but I might actually look at using something like my Svartisen NNN with perhaps mid-width XCD ski (Epoch/S98 range) if I was going to do trips like that. That boot has a surprising amount of ability and I'm pretty sure my foot could tolerate it for a long time with NNN. To me, the ski provides a lot of the dh fun as long as you have enough boot to control it. If I were to tour for a long time with a boot that stiff with pins I don't know that my feet would like me much. Of course even with NNN, that boot is right on the edge of being a comfy tourer.