Great to get other viewpoints, Chris. It's important to recognize that there are many different needs and use cases. I recognize that software design is hard for vendors attempting to satisfy everyone's preferences.
I would have a problem employing your workflow on larger webinars, particularly involving numerous people working behind the scenes. The question panel allows important controls such as setting priority flags, seeing which questions have been answered, and assigning questions to named speakers. If we're trying to copy and paste questions into the chat panel, we lose all that. There's a delay while finding questions and doing the copy/paste.
The chat fills up with tons of chatter about "I think that's a good one." "You mean Mary's?" "No, Jim's" "The one Jim just wrote about pricing?" "No, the earlier one about capabilities."
Then when I need to type an important message to a presenter, like "Louder Please" or "5 Minutes Left" it gets scrolled out of view and lost in the chatter.
I really do think the ability to work on individual questions in a structured interface is useful. I just would like to be able to assign more members of the team to do so without worrying about giving them other session-level power.
Probably the right way to satisfy both of us is to make the ability to work with the question panel an assignable capability that is not tied directly to Panelist/Organizer role. You could even give it to assistant triage people who log in as Attendees because they never need to speak. Then we can both work in the ways we want, with complete flexibility.