slugmoneytl;dr: function over form, not form over function. Great game.
You're completely right in your feedback. But as _DUSTY_ said, these are different areas focused on by different developers.
Shredsauce definitely nailed the core gameplay really well, but with a bunch of smoke and mirrors to make things feel good. As we're developing a much bigger experience we can't rely on tickery to make systems and mechanics work as we want. We have to build them from the ground up to be completely dynamic so that the world can live and breath on its own.
One of the things our lead developer has spent a majority of his time on over the last month is to physicalize the skis. As you'll notice in both SNOW and Shredsauce, the skis are not actually "physically" there. If you ski into something you'll see that the front half and back half of the skis clip through the object. Malcom has done a great job working around this for Shredsauce, but we feel that a lot of what we believe is really solid gameplay will come from having they skis fully physicalized. With that fixed, grinding will actually work properly without us needing to build a whole system around it.
The reason we can release new levels is because our art team (3 guys now!) are building assets all the time. To build an entire open-world mountain with every possible detail we need to pump out a lot of art assets. We have made a priority list and sometimes those assets can be used in stand-alone levels. So for JOI and Fochi, 99% of those assets can be reused in the game somewhere else.
I spend every day playing SNOW trying to figure out what we need to do to get the core gameplay locked down. Unfortunately it's not an easy fix and will take a few more attempts to get it right (including a few new features). We decided to release SNOW early so you guys could give you feedback, but we also ask that you are patient while we try to get things working properly.