We enjoyed it, too. I wish they would come back, but I agree they won't do it if they don't get lots of people to attend. That's why we liked it so much- low crowds. If enough people bought tickets to make it profitable, then we may find it too crowded.
I do understand how people get irritated when the parties run just about every night, so Wishes is hardly ever shown during a trip. But I personally wouldn't work myself up over the MK closing at 7:00 two nights per week. I guess that's because we usually go in January when it closes pretty early anyway, so we are just used to it. We would usually plan on doing night at MK on a Spectro night, which, itself, is only a couple of times a week, and wouldn't be on a party night.