Never mind what Disney said or didn't say.
I can stete for certain that this refurb has been in the works for over 5 years and has at various times been set to include new track, new trains, onboard audio, new effects, new pre/post shows, etc. which would bring the 30+ year old ride into the 21st century and return it to a state that is worthy of it's iconic status.
However, it became apparent over the last year or so (substantially in the last few months) that they had decided not to spend the money on a full refurb, and just make enhancements to the load area, some new queue items, improvements to the ride control system, and smooth out some sections of track.
Considering what Disneyland got from their refurb (most of what I listed above), the expectation was that MK's Mountain would get a similar treatment. That is where the disappointment comes from.
As Tirian said, THIS is what happens when you let TDO call the shots. The new FL is what you get when Burbank gets involved.