Minor optimizations were implemented for Viewport 2.0 to handle complex scene refreshes more reliably.
Pirated/cracked software is illegal and unsafe (malware, botnets). Use the from Autodesk instead.
The core purpose of the "autodesk maya 20185 fixed" update was to address specific, reported bugs. While the full list is most reliably found in the official release notes from Autodesk, community discussions and industry reports highlight the general focus on stability and performance. The update focused on smoothing out rough edges in the existing toolset.