I agree with the ski area expansion comments. Fixing the traffic problems means a lot more skiers at Alta and Snowbird, and with no additional terrain that just means longer and longer lines. Perhaps the only good thing about the current situation is that the canyons bottleneck limits the total number of people that can be up there. More buses, or cars plus gondola users, mean a lot more people sharing the slopes. Great for Alta and Snowbird, not great for the on-hill experience unless people can spread out more. I haven't heard any recent updates on the Mary Ellen Gulch expansion by Snowbird, and I would imagine that backcountry users and Save Our Canyons would be livid if Alta tried to put a lift up Grizzly Gulch.
As far as the economics goes, I agree that the ski areas could probably raise prices as demand is clearly higher than supply. The problem, of course, is that once a ski area sells you a season pass, they don't really care how many days you use it. If you purchase a $2,000 Alta pass and then only ski 4 days because canyon traffic is so bad (I know that's a huge exaggeration, I'm sure the average Alta passholder skis quite a few days), that's great on Alta's part. It's similar to the Planet Fitness business model: underprice your gym memberships so that people who wouldn't normally consider a membership buy one, and then bank of many of your customers not really being able/willing to use the membership.
Of course, while some people would celebrate the ski areas raising prices, others would be angry at skiing becoming even more of a rich person's sport and there would be calls for the Forest Service to terminate their special use permits.
Alta/Snowbird could also permanently shift to reservation systems. That would piss people off, but would control crowds while also keeping prices from going through the roof. But again, not everyone would be happy, plus they might be leaving money on the table by doing this.