I am not so sure anymore why we decided it was a good idea to allow providing a linkset payload as the content of the Link header of the link set resource:

• It can only be done for linksets formatted according to the application/linkset format, not for the application/linkset+json format.
• It seems to go against a major motivation for introducing link sets, i.e. HTTP headers can become too large when many links need to be provided.
• It requires clients to go look in two places to find linkset payloads: in the header and the body of the linkset resource.

Would it not be more elegant to provide linkset payloads only as the body of the link set resource?