What's the easiest way to grow the share price? Stock buy backs, cost cutting, efficiency gains (fewer employees), new technology, synergistic acquisitions, etc. Capital expenditures are NOT popular ways to grow Shareholder value.
Eisner chose much more conservatively when it came to doing his job for the Shareholders. He was successful, the price DID go up a lot. Iger has been very different, invested MUCH more $$ in things like theme park attractions, and he's been even more successful than Eisner.