I suspect you are right about this. I bet many (most?) people that do an Alaskan cruise probably think all Alaskan cruises are similar, and aren't aware of how amazing Glacier Bay is.
Not sure when you were planning on adding the other person, but just be aware that you may or may not be able to add them, depending on muster station capacity and availability.
At this point, it looks like tropical storm force winds could impact Tampa from Wednesday morning to Friday morning. It doesn't look like it will impact Galveston.
I think you are responding to the wrong person with this. I'm not the one that suggested that they change anything. I was restating what the OP had asked about...providing an option.