I don’t think these are mutually exclusive? The Sequences are long and some of the posts were better than others. Also, what is considered “clear” can depend on one’s background. All authors have to make some assumptions about the audience’s knowledge. (E.g., at minimum, what language do they speak?) When Eliezer guessed wrong, or was read by those outside his intended audience, they might not be able to fill in the gaps and clarity suffers—for them, but not for everyone.
I don’t think these are mutually exclusive? The Sequences are long and some of the posts were better than others. Also, what is considered “clear” can depend on one’s background. All authors have to make some assumptions about the audience’s knowledge. (E.g., at minimum, what language do they speak?) When Eliezer guessed wrong, or was read by those outside his intended audience, they might not be able to fill in the gaps and clarity suffers—for them, but not for everyone.