It also mostly clears the way in the Middle East. Iraq stabilizes further, Shia/Muslim international terrorism and extremism takes a big hit, the Abraham accords continue and accelerate, Syria and Lebanon continue to stabilize and turn towards the West, Hezbollah/Houthis/Hamas are largely neutered, and a friendlier Iran turns on the taps for Europe to continue diversifying away from Russian crude. The only downside is Turkey has a much free-er hand in the region and will work to further align Libya, Syria, Lebanon, and Sunni extremism towards their worldview.
If the Mullahs actually fall, it will be awesome. A western friendly Iran will help western goals worldwide, including the Pacific. Fingers crossed
Relative to the neighborhood, the Shas's reign was peaceful and stable.