Thanks for the super detailed write up and feedback! Mucho appreciado. Let me address some of your points, not to counter them but just to shed light on why we did what did (and how we can improve things moving forward).
Re: the liner - For serial production (read: what you guys can buy in the fall), the 130 liner is getting beefed up in the heel & ankle area, slightly snugger in the fore foot, and a thicker/denser tongue. This will bring the fit as close as possible to normal Ultra 130 and provide a better feel in the boot while skiing. Better damping, better ski feel, overall more betterer. Additionally, the 120 will get a liner that has a build more similar to normal Ultra (plastic cuff, plastic tongue, etc) but with an Achilles flex zone. It won't tour as well, but it will feel more like an alpine boot.
Re: progressive flex/stiffness - This is an interesting topic to dive into. On paper/robot measured, we are very progressive with a slightly stiffer feel "off the top" compared to boots in this category (and against full PU alpine boots). But very progressive, not linear. For me personally (which mirrors our robot flex data), I find the Zero G to be super linear, super soft, and hard to control. So if testers like the way the Zero G feels, this will feel very different, almost harsh in comparison. And vice versa for those who don't like the Zero G. On one hand, there is a way to measure objectively how a boot flexes but then there is an equally real yet very subjective feel to each boot. I don't think one is truly more right or more wrong, but just good to be aware of. Additionally, I think a lot of people will like the 120 model, which uses a cuff made from world cup grade PU. This boot will be heavier (due to the liner as well) and feel more "alpiney" than the 130. If you can get on a pair of these, I'd love to hear your feedback.
(FYI - For those of you who want to see it, there should be an image in this thread that shows our flex test data)
Re: WTR sole - This is one part of the equation that allows us to ski as powerfully as we do. When we were testing sole configurations, a full-rubber sole was definitely on the table. But, in an alpine clamp style binding (STH 2, Warden, Jester, etc) rubber soles compress and deflect while skiing, resulting in a tangible loss in energy transmission to the ski. What WTR provides us with is a fully hard connection to the binding, just like an alpine boot. This ensures that the energy generated from 130 shell material makes its way to the ski and isn't lost in the rubber sole. Obviously, this doesn't matter in a pin binding, but for freeride-alpine bindings, this does make a tangible difference in how well the boot skis.
Re: 13° forward lean option - This is something we can for sure look into with a different flip chip. I'll get back to you on this.