I will try to add a different view.
IMO it's NOT in the first place a fight (a war) between the league and the union, it's NOT players vs. owners, it's not small markets vs. big markets.
what the league (the owners) want to achieve in the first place is breaking the power and influence of the agents.
this league has become an agents league much more than a players league or an owners league. (or even a fans league)
do we really believe that the whole "we take our talents to South Beach" was based on some friends doing some phone calls? or that the Melodrama works out like this just b/c he cried loud and long enough that he wants to go to NY?
agents have become the major force behind the sceens (they always were powerful, if they played their cards right, but there still was kind of a nuclear balance).
agents power is based mainly on the Bird rights. (even more with the s&t option). most of the most absurd contracts from the last years are NOT MLE signings (to many still are), it's been Bird rights signings. teams more often overpayed their own players to stay than FAs to come in. teams can pay almost any number on bird rights and agents used that fact excessively. how often did we even hear the "disrespect" word, when teams were not willing to overpay when they theoretically could.
the league could terminate Bird rights, but this would also (or maybe even more) hurt the small teams, when it comes to keep the franchise player. (it's never the paying of the Duncans and Durants, that blow the payroll, it the overpaying of the mediocre talents, the borderline starters)
so Bird rights are a holy cow. what to do? make it almost impossible to use Bird rights more than once or twice in a certain time span. no agents can just come up in a negotiation whith the usual "hey, you got his Bird rights, just use it", when this costs the team 3,4 or 5 times the number, that already would have been to much without any taxes.
we always talk about small teams fighting against big market teams. that's only half the truth. why don't the big market teams cry out loud about such proposals? or take the side of the decertification group? it's b/c the big market teams want to reduce the influence of the agents as much as all the other teams.
I think agents (the big 7)realized in the last weeks that it's mainly against them and that's why they panic now. they claim that they would have prefered a decertification for months. why do they push now? owners and league position was well known before. I think they always thought that the new tax rules will be dropped in favour of the split and that this is just a negotiation tactic. when they learned how much weight this point has for the owners, they finally saw that in reality it's an attempt to destroy the foundation of their power.