It certainly is an interesting problem for them to cover construction and still grow.
My pet peeve was always rides like Star Tours. Why did they have to close the entire ride for months when they redid it?
The attraction has a split to the queue and as I recall, they didn't change the queue at all. So, why couldn't they have left the ride operating at reduced capacity (only one side) while they upgraded the other side, then reverse? I can see where you can't do that on major overhauls like Test Track, but it seems that Star Tours could have been done much more efficiently.
that said, I know that I don't see all the facts and figures that the Disney management does. I am sure they don't have constuction be visible and close rides just to be evil.
In fact, it's incredible what Disney manages to do behind the scenes as it were. The amount they clean and sparkle and fix and maintain overnight is truely mind-boggling. The transformation of the Disney Magic and the very short time it's dry-docked is truely astounding and the decorations they manage around the parks with minimal disruption given the crowds is really a feat of wonder.
I don't think Disney doesn't care about the magic anymore. But I do think they accomplish more than you believe they do and the work that goes into these things is a huge undertaking. It's impressive they do what they do with as little disruption as they do. Cosider I am having a new house built and it's taking 4 months. To build ONE HOUSE. Now look what Disney has to accomplish. And they have to do is safely so no one is hurt - especially when the rides are done. And they have to work - day in and day out with minimal downtime and maintainance. And they have to do it with thousands of scampering feet pushing and looking and moving and crowding every day.
Until you have walked a mile is Disney's shoes, don't assume the work is easy.