No, it won't.
When management spends way more money on Magic Kingdom, and it is far better than Disneyland, the Disneyland geeks will moan and moan about how crappy Disneyland is compared to Magic Kingdom, and why can't their park be like Magic Kingdom. When Disneyland is far better than Magic Kingdom, as it is now, the Disneyland geeks will moan about how crappy Magic Kingdom is, and how they are glad Disneyland isn't like it.
See what I'm saying?
Disneyland fans will always moan, they will just take different slants.