Excellent link you provided poetica. According to this the PA share would be between 64.4% and 70.3% next year and it never gets to 50-50.
You're right, it was a good link as it had some very interesting information about the current bone of economic contention. However, a point you seem to have missed is that the NHL was using the PA's projections OF FULL SEASONS against their projections including a truncated lockout season to come up with those numbers. As a result, those numbers do not accurate represent the union's proposal as the NHL was comparing apples and oranges to come up with them.
As Bookie's message aptly quoted from the very story you quoted, the union has been very clear about wanting to get a deal done based on full seasons and only then working backwards to address a shortened season if there even was one to be addressed. Their next proposal may very well address a shortened season at the NHL's request, though it still seems like a silly waste of time to talk about how to deal with the lockout until you know how much hockey will have been lost for sure.