Honestly, if we all try to put ourselves in the shoes of Joe Public, rather than Joe Enthusiast - consider this scenario:
You've planned a trip \ holiday. (less likely in current times, but QLD residents can still travel). You've got limited time and you're due to arrive on the coast on X date. You dutifully check the maintenance page, and see that Superman is due to open a day before you arrive. Hooray, we will get to ride it. You go the day after you arrive. You arrive at the park to find the fence is still up and the signs out front (if they're still there) tell you it's still closed. boo.
The alternative is - you arrive on the GC after checking and seeing that Superman won't be open the entire week you're there. Bummer, oh well, lets have fun - arrive at the park, and... what's this? its opened earlier than planned? WOOHOO!
It is far more disappointing to arrive, believing something will be open, and finding it closed, than the other way around.
I recall my last trip to Disneyland, hoping to take my wife on Space Mountain as it is my favourite ride in the world and she had never been on it. We'd checked all the maintenance pages and its scheduled maintenance wasn't for months. The day we arrive, we bee-line to the ride, and it's closed. Checking the discussion forums and news that night, we found out OSHA had shut down numerous sites in the park for safety violations (i think it was handrails around work areas) and the shutdown would take more than a week. We were bummed out. The reopening date meant we wouldn't get to ride it at all.
Except on our last day in the park - a little after lunchtime, a cast member told us it was currently testing and likely to open that evening. We spent the last 4 hours in the park that day riding it repeatedly.
The disappointment we felt when we found out it wouldn't be operating during our trip was huge. It was the 'main event' for us as far as we were concerned. But, knowing the date it was to reopen let us move on - we resigned ourselves to the fact that it wasn't going to happen, instead of repeating the disappointment each day when we arrived to find it was still closed.
The fact that it DID reopen before we left was a bonus, and a happy ending to the disappointment.