I also have very bad performance with the latest patch.
System: Ryzen 7 3700X, 1080ti, 32GB DDR4-3200
Temperatures: No matter which graphics settings I choose, the game makes my GPU run about 5°C hotter than various benchmarks and stress tests (75°C instead of ~70°C) and about 15-25°C hotter than all other games I play. In fact, I haven’t seen above 61°C in any other game, no matter how demanding they are, so even Shadow of the Tomb Raider or Assassins Creed Origins don’t push temps higher. Less demanding titles like Grim Dawn or Elder Scrolls Online usually keep my GPU in the range of 50-55°C while running at 100fps+.
Performance: 25-45 fps and constant stuttering. The latter makes it a really uncomfortable experience. Not that the fps are fine. And again, graphics settings don’t matter. Ultra, high, low, custom, all result in the same performance.