For me, it's quite the opposite. They've realized it doesn't matter if they do softs or not. In the twitter-age, a soft is just as critiqued and mentioned as an opening, so why hold your cards. Run CM softs as much as you can if it's ready and then grand opening after that.
I wouldn't be surprised if softs are a distant memory in the very near future.
And to be honest, if it's a quality attraction, people aren't going to hate that it's unreliable on the first few days. The quality of the ride will be more of the story. Perfect example would be: Did anyone here ride Hagrid's or RotR for the first time and immediately text a friend "This thing has reliability issues. So glad I got to ride it without it breaking down!" Or was it "This ride is amazing! You have to ride it!"