Yes, but dozens of people comprise Walt's former job. The fact that WDW was at its prime in the nineties when they were breaking ground of all these things rather than setting them to autopilot is indicative that conglomeration shouldn't be much of a factor anyway
Remember this was Walts vision livelyhood his family legacy. The folks that run Disney at best are temporary custodians of his dream.
They will all be gone at some point and pass the torch to another CEO etc. What they do during their time is what will tell their story but they have a different master the stock holders who live for results and profits. They need to produce from quarter to quarter and show profits no matter what it takes to do. Walt had no one to answer too but his fans who watched his movies and visited his park. It was all about the Mouse as he said.