Hi Brian! Thank you for sharing your thoughts about adding new courses to the game. I assure you I'll give our developers a heads up regarding this matter. We will discuss it with the team and try our best to make it happen soon. Have a great day!
Asan was added January 2022 (~2 years after app launch); to my knowledge, that was the only course added since the app has been available to the public.
B components were also released with the Asan launch, which have been the largest impactful enhancement to PSG since inception. (yes - more than club stat standardization or perfect zone increase, in my opinion).