I'd like to echo the comment that requiring people to regularly visit the site does not seem to meet Debian's needs very well for trust. I'd imagine there are a number of people in our community who will tend to read things via email, but who would only visit the site to help moderate--splitting topics, editing things, flagging posts, etc. You can like a post via email.
I think it is great to try new things. But I think that biasing the moderation power too much toward people who visit the website would make me uncomfortable trusting the system for important project discussions in ways that a system that allowed all our trusted users to be trusted would not. I absolutely think it is reasonable to require people to become familiar with the site and its capabilities. I think it is reasonable to expect trusted members to understand how this is different from traditional email. But forcing a particular interface on those people seems problematic. From my personal standpoint, the site isn't horrible from an accessibility standpoint, but reading what I can out of email is always going to be more usable for me. I'll go to the site if I need to, but being forced to go to the site to meet some metric is off-pissing. I'm not saying this needs to be addressed prior to experimenting. I'm saying that as an individual I want to see an improvement here prior to depending on this for any important project decisions. --Sam