Well the big thing that will be remembered from Eisner's tenure is that he let Disney animation become a thing of the past and created "cookie-cutter" attractions that can easily be found (in forms) in regular parks across the country. It comes to money.
Now, the following is my PERSONAL opinion.
Eisner, as any CEO cares about stocks and the value of them. Eisner just, in my opinion took the safe road on making profits, which is not a formula that I feel is safe to keep the Disney aura. Eisner simply decided, you cut costs, which will increase profits. He feels that you cut costs and scheme ways to do so but yet keep the public energized about coming. Therefore, he changed rides such as AE to SGE but yet, it's really the same ride, when talking financials of the change. Eisner has done alot of good, Mission Space, and Expedition Everest and AK as a whole. he wasn't helped by the 9-11 trajedy.
Eisner cannot be fully to blame for everything but now that the economy is improving he is showing his flaws even more. He put a hiring freeze on all employees temporarily and now it seems it will be pretty much part timers only. Two years ago, he drastically cut operating hours in the Magic Kingdom, to even 8:00 pm on PEAK nights just before Easter.
Eisner basically just sees it as "cutting costs increases profits". but, eventually smart consumers, and consumers as demanding as Disney consumers are, will not put up with that forever, as was seen at the shareholder's convention.
Disney needs a CEO who still cares for the stock (you want even as a consumer for your CEO to care about stock) to be more risk minded and innovative minded. Disney is all about innovation. We need to see Disney discovering things that other parks mold after instead of Disney molding themselves into the present. If Disney lives in the present, then it's not doing it's job.