Really interesting to read other people's thoughts on reservations. My gut, as a heavy user of a local mountain on IKON, is against them, since my pass is only worth it to me because I use it a lot and love the flexibility of making last-minute decisions. Not just powder-chasing but touring conditions, work needs, partner availability, etc. The price is not worth it to me for 7 days I've pre-selected in the fall (then maybe a few other bonus days, if there's still room when last-minute spots open up).
I like parking as the throttle on number of people on hill, rather than reservations—I'm not opposed to an early start to guarantee I can park, and limiting parking means that every "spot" is used, rather than a certain percentage of reservations that will go unused each day.
But then I recognize I'm pretty privileged to be able to arrive super early for a guaranteed parking spot, and if there are only a limited number of ski days available this winter it isn't super fair to let one sliver of the population horde them. But, again, blocking users from using it any day they want to get there early enough turns a Season Pass into an X-Number-of-Days Pass—and it would need to be significantly cheaper for me to still find the purchase worthwhile.
One thing that worries me is that while I'm all for some extreme measures this winter (and, sigh, maybe next) for Covid reasons, I'm worried that resorts will keep many of these policies, figuring that once people no longer expect to be able to use a season pass any day they want, or start their ski day when they want, they have no reason to go back.