I have to think about that. Probably not cuff height and flex since I think thats pretty good with ski boots. Maybe a little though. Although I'm sure the old "you're going to break your ankles" thing will pop up. But I've yet to see a skater break his ankles, and yes skis probably apply different forces. But there's definitely similarities. I've spent a ton of time in lots of different skates and when i do certain tricks on skates and skis, it feels almost the same.
I do prefer the shin closure system on skates though. The il moro's have it (which you can see I just ordered) and it felt way better than the other closure systems. I like the 45 degree buckle that holds your heel in too.
And heel lift, I know it apparently happens regardless and can be minimized a lot. But I have zero heel lift in my skates. I don't have a direct comparison of the internal anatomy of my boots and skates, but somethings going on.
This will sound crazy, but maybe integrate the liner into a ski boot? My skates have no liner and as a result, I sit right on top of the soles and frames, the skate is slimmer, lighter (also cause it's made of carbon fiber), and I feel as though I have way more control. couldn't hurt to try. Also skates have laces which i'm sure has a lot to do with it. but some skates don't, like xsjados which are basically snowboard bindings.
Maybe you don't need buckles everywhere either? I suppose thats the lacing system, but my skates are tight in spots where the laces don't touch.
I'd say my skates are like a 3 piece boot. The whole thing is a carbon shell with a leather exterior, but it behaves like a 3 piece boot. A rigid bottom part, the flexing tongue, and the cuff.
someones gotta try eventually.