King Bed is a bookable category at Riverside. You would actually pay extra for it.
It would be interesting to know which of these are dealbreakers. Are you willing to go without a dining plan? Without a package reservation? Without the king bed? To a value resort?
7 day park hopper tix (14 day expiration, no plus options) are $408.96 so that should have come out to about $818, not $990.
Easter is April 5, depending on their dates discounts may not be available for some or all of their trip.
(I was curious, so I looked. That price appears to be correct for the last week of March even with the spring room discount included. If it were me I would keep the Riverside room, book room only, go without the dining plan (the price really jumps as soon as you add the dining plan) and maybe try UCT for tickets, it's not much of a discount but it is a discount.