Highly doubt it. This is not the first time that sailings have been heavily modified for things beyond Royals control.
It's already in the contract, they haven't felt the need to modify it or as you suggested in a later post "sign waivers" so I highly doubt there will be any changes due to this unfortunate situation
There are height restrictions. Those can be found in the app for the sailing under activities I believe.
Some in splashaway bay (kids area) are 42" other slides are 48" or 52" depending on the slide
Your post made it sound like there was a need as you mentioned the $500 (the amount of credit they will grant) and you said that
"If that runs out and they need anymore money added during the cruise they will call your stateroom and ask you to add some more."
No need to give them any money up front. They will allow you to run a $500 charge on a 7 day or longer cruise before asking you to pay it down. $300 on 6 nights or less.