Just what I was hoping to hear!
With the 9.1.0.39335 build of the game, the Quality Assurance team thinks they have the Map related FPS issues fixed - this time without unexpected side effects. Please use the Battle.net Desktop Application to update to the latest version and retest. If you are still having performance/stuttering issues specifically while using the map after the update, please let us know.
If you have FPS issues in other scenarios, this would be unrelated and you’d need to look for another thread related to your problem or start one of your own.