Honestly if the crowds are lower than anticipated, they'll probably seek to up various AP perks and change the gate price to the dynamic pricing tiers, making it no longer an online exclusive. They will never actually fully lower prices, it's the ultimate sign of weakness. Even the early years of DCA, Disney refused to lower the single-day admission price and opted instead to introduce the 2fer deal that essentially made DCA nearly free and barely ever raised the price of a park hopper.