The GM meetings were last week.
Just so happens to coincide with the point that the brass realized this was the best offer they were getting for Heyward without a window to extend him (not to mention one that wouldn't have concluded with Jason signing an 8 year deal).
For those that have ignored the Cardinals' side of things, Mozeliak has said ALL DAY that they looked at the deal as a short-term fix.
They wouldn't give Pujols $240 million, if you think they've suddenly become an organization that values Heyward's defense almost as much as Pujols' offense and are willing to drop $180+ million to keep him, there's not much anyone can help you with.