This is a quick sketch of several modifications to zerolink. This document tries to articulate an as of yet unproven intuition is that combined together they can allow unequal input amounts as well as relaxation of the post-mix no linking restriction, while retaining the same conservative assumptions about mixed output indistinguishability.
Disallowing post-mix linking is arguably bad for fungibility, since users are likely to bypass this restriction by transferring to other wallets. Therefore, if I am able to justify this change this seems like a much more substantial contribution to usability and fungibility. That said even if it can't be shown to be reasonable to do so, some of these ideas still have merit on their own, so not all would be lost.