Let's look at it from this perspective... how does it measure up to what was there before?
In all aspects, it SUCKS compared to Timekeeper. But it's a decent experience that I'd go see when there is no wait. The problem with Timekeeper was the fact that I'd have to wait 17 minutes to see the show, not that I didn't want to see it. And the 5 min. preshow for Timekeeper was interesting. So I'd wait about 10 minutes for Timekeeper at most, leaving that 7 minute period where I'd pass it by. With this new thing, there's no way I'd ever wait more than five minutes. The show is only every twenty minutes. Which basically means I'll see it 25% of the time... given that there is no wait.
Is it fun to do? Sure! Will I do it over and over? Heck no.
We seem to have forgotten the reason to make a good attraction. Disney needs to make good attractions so people will WAIT for them. This is why FastPass is such an evil concept. Attractions are built to raise the capacity of a park. Capacity goes up when guests are waiting in line for a short amount of time, which should never rise above 30 minutes. For a park to achieve that balance is the ultimate goal. A wait time of 5 to 30 minutes for every attraction, with someone always in line, and the attraction always filling up. Shows like Monster's Inc. Laugh Floor go entirely against this concept, simply by not having a preshow that is long enough to keep people in line. It also reduces the capacity of Timekeeper, because it adds seats. Not just little seats, but gigantic seats. The attraction is NOT thought out well.