It would indeed be hard to compress those sequences - and impossible for other sequences, such as those on meta-ethics and quantum physics. But I think it could be done. Some information would have to be lost, but that is okay: it's still there in the original sequence.

The goal would be to lower the barrier of entrance to Less Wrong. Right now the entrance exam is, "Go read the sequences," which is a command to read more words than are in Lord of the Rings. That's insane. We need a better way to welcome newbies into the site.