For High in the Sky, issue is the trains themselves are some of the most difficult/inconvenient vehicles ever created for a ride. So if you run one side only, it could lead to very slow load times and reduce capacity. But if they can fix that, the ride should definitely run as one giant loop.
Speaking of signs, very minor nitpick, but Green Eggs needs a sign with a menu board that's far closer to the main path. Lots of people walk by it, but too lazy to actually walk up to the counter to find out what's there. So pretty much those that already know are the only ones ordering there lmao