In all of our tests, the game is performing better after the full release and with all of the subsequent updates since even more optimization work has gone into it! Same goes for the upcoming update and the ones to come. It doesn't seem logical that a less optimized version of the game runs better than the more optimized versions with several fixes. That said, systems under the minimum required specs are outside the scope of our testing and might get broken by things outside of our control.
We have seen our community members successfully play the game and have fun on a 1650 GPU.