Yup, spot on. My monitor is 95Hz so with vsync turned on I now get the flickering on an intermittent basis at 95fps. With vsync disabled (allowing the frame rate to be the maximum my GPU can produce) the flickering is near constant and makes the game completely unusable for anyone with a high refresh rate display and strong GPU. This was not the case with 1.0.50.
My bigger annoyance is stuttering which occurs at all frame rates, so it’s not like I can just cap my frame rate to avoid the flickering and all is well. Again, this stutter was not present on 1.0.50. New launcher (1.0.51) causing stutter on Windows systems [SOLVED]
Unfortunately there is now no way to demonstrate/prove that the old launcher did not have these issues with every other variable unchanged, since it cannot be used any more.