Mark Benioff is the CEO of Salesforce, the tower's largest tenant; he is not an owner or the developer. The crown is obviously being constructed now so it isn't feasible to change it and it will be what we get, as has been extensively discussed in this thread for a long time.
Pelli is really your least favorite architect? Try researching to see who designed some of the truly ugly buildings here and elsewhere. In the meantime, here's a shot of Pelli's Gran Torre Santiago that I recently took in Chile. At 984', it is Latin America's tallest building.
[IMG]
Gran Torre Santiago by
viewguysf, on Flickr[/IMG]