My reading between the lines
Players to union: take the fucking deal
Union to players: they said there is room on system issues. Lets all act irate at the proposed deal, list every system issue, and hopefully they will budge on a couple.
Players to union: If we do that, then you take the fucking deal!
Union: Of course we'll take the deal.
Fisher and Hunter listed every system issue that has been changed as areas to be discussed. They also said there are some issues that are not negotiable. However, they did not list which of the issues are non-negotiable. why? Because all of them are negotiable. Once the owners move on a couple system issues, the union will say that they held firm on the non-negotiable issues and got their victory. It's all about who has the biggest dick.