It's hard to see what a compromise would look like. Steem wants the contract with Ned about the use of the STINC stake honoured, and Sun wants to be able to sell that stake at any point of his choosing. These two lines in the sand don't share any overlap.

Maybe a compromise (if coding it is feasible) is for us (steem) to lock up a proportion (25%?) of the STINC stake for a set period of time (1 or 2 years?) to be used for growing the blockchain value. After that point all the stake is available for Sun to withdraw at his pleasing. Sun is ultimately going to get the latter with the help of the exchanges by the looks of it, so it makes sense to give him that ability while still working to grow the value of his investment.