I use the Instant Action Mig 29A landing mission at Sochi to test. Prior to the latest patch I had to turn off core 0 for the game to run smoothly in MT (ST had no issues) otherwise I would get huge drops in framerate when approaching the runway threshold, during touchdown and rollout.
After the latest patch the game runs a whole lot better and now, I only get a few (1-2 sometimes 0) small drops in framerate (noticeable but playable).
Switching to F10 map and other views causes a big freeze or significant loss in framerate. In that respect it's still not as smooth as turning off core 0. However, the performance during flight is a major improvement over the previous version on my old system with only four cores (I5 7600k).
Whatever tweak ED did for the latest patch worked really well. Hopefully the next patch gets it to run as smooth as turning off core 0.