I’m aware, if it was Epic Universe, then the question of “how will they handle it” would've already been answered.
Another huge price hike wouldn’t really help with excessive crowding to EU.
The seasonal pass has block-out dates that reflect peak crowds, but if they continue with the normal block-out dates, and EU opens outside July, the initial crowds at EU would cause a period far busier than normal, even if the other parks are normal (or less than normal).
So in addition to price hikes (which should be expected since value is increased), how will they account for the initial months? Extra seasonal pass blackouts? EU-specific block-outs? An EU-excluded AP?
Currently, if you don’t do Volcano, UOR’s highlights can be done in a single day, with 2-days being far more ideal, but now with EU, the minimal will easily increase to 2-days, with comfortable probably being 3. As a result, the amount spent on per-day tickets by the average guest will gravitate towards the cost of annual passes, so further price increases make sense.
That said, since the top-tier prices just jumped (in isolation) I could absolutely see all passes getting price hikes, but the lower tiers getting EU specific price hikes, and their lack of hikes right now, reflects that.