I popped into a Flight Centre today to get more info & the consultant didn't know much. (He also didn't know how I'd booked accommodation without booking through them :/) Anyway, there doesn't seem to be any special prices with the offer as he checked their wholesaler website & gave me a quote. It was $150 more for the Paradise Pier package for 2 people (5n + 4d park hopper) than through the Disneyland website, & when I mentioned this, he dropped $100 off, which brought it back to $2238.
I have already booked the BWPPI (it's cancellable though) & with the Disney tickets, the total cost will be $1345. It's not worth $450 each for us to change plans. Maybe if it was $300 each, the benefit of staying in a Disney hotel & the little extra's might be worth considering.