Yeah that doesn't quite seem right, both the date and the issue, especially since right now Quantum is sailing at a respectable 17 knots. I also don't see any Quantum itineraries that even go to Endicott Arm. They all go to Tracy's Arm
I've gotten that questionnaire in the past, but haven't got one for my next cruise.
It's immaterial though whether you fill it out or not. It won't affect your ability to board.
Funny story, way back from the dial up era. I was working for a newspaper that also was an ISP. Some guy called up saying he couldn't get online no matter what he did. Turns out he didn't understand that you couldn't be on a call to someone while also trying to connect to the internet.
Capacity is based on double occupancy. So if the average people per room is 3, they can exceed double occupancy even without selling some cabins.
I want to say average capacity prior to covid was 107%