the new draft system, eliminating picking over slot, and the loss of draft pool along w/ pick for compensation
the elimination of acquiring 1st round picks for losing talent
eliminating the language in the cba that protects picks based on the worst team records instead of just the top picks...under the old cba, even if it had been reduced from 15 to 10, the mets pick would have still been protected
the IFA bonus restrictions
the increase of super two players
those are just a few off the top of my head