I just encountered Archive Binge, a website that makes custom RSS feeds of certain webcomics' archives, presenting a few comics per day so that people can easily catch up to those comics' current strips without overloading themselves.
I strongly suspect that a similar tool would be useful for the Sequences. It might be good to have a few extra features, like the ability to only see posts with a certain tag, but even just a basic feed that presented one or two of them a week would be useful.
It might be even more useful to, rather than allowing each person to make their own feed, have a single feed that cycles through everything and then restarts, to encourage new conversations about those articles between people who are reading the sequences at the same time. If the resulting cycle is too long, we could also have a second or third feed offset from the main one, so that no one has to wait more than a few months to subscribe to a feed that's starting at the beginning.