Considering the penchant TDO has to cut "unnecessary" costs, I can't say that I'm surprised that we're seeing the opening shows disappear. Disappointed, but not surprised.
Well, but what is necessary? Restrooms maybe. Otherwise, everything at Disney is entertainment, so they could cut everything because it isn't necessary following that argument.
And things like the opening shows are stuff that make me come back to Disney and put up with the premium they charge. If they demand the prices they do, they need to put out a premium product. And a first class experience is about those extras.
To be honest the disappearing of all the opening shows besides the MK (and who knows how long that will be around, it is the most expensive one for sure) is a real let down for me. I like to be at the parks early and seeing the show gives me a wonderful boost of energy to start my day at the park. This is what Disney is about for me!