If Disney had given the DCA project the proper amount of funding and given it some true attractions instead of lightly overlayed off-the-shelf rides, then people wouldn't have ignored the park.
The theme of the park wasn't what was broken. It was the budget. The California theme is immensely rich in possibilities, and the park truly could have been a work of art if it hadn't been for Eisner's micro-managing, Pressler's shopping-mall centric mindset, and such a pathetic and inadequate budget.
Using the excuse that Disneyland wasn't the greatest park when it opened is incredibly weak. DCA had no excuse - it should have been a great park from the start and become even greater over time.
Instead, it opened as an incredibly weak park, and hasn't really improved much since. And the fact that Disney has had to have extensive meetings on re-Imagineering the park and rumors of a $1 billion makeover pricetag alone proves that DCA wasn't executed properly to begin with. Everybody knows it and I wish people would stop making excuses for the park.