First, nice read. Second, thanks for the enlightenment :D. I was always frustrated with my comments going into DMs. I thought they go to DMs as well as the comment section, I never bothered to check back. About the toggle feature, I never knew about it.
To your solution, I’d like to add that the “sending as a message” should also be the same color (highlighted) as the DM icon since everything else is faded, it’ll be even more easier to notice if the option is toggled.