Already in an interesting matchmaker, facing 8.0s a lot due to a fair few 8.0 British vampires, meteors and sea hawk, the Spitfire mk 24 seems to suffer a lot, especially with a very high silver lion cost.
The proposed BR changes and lowering the Mig15s to 8.0 will absolutely ruin the use of this plane. Understandably the plane sits in a niche spot as an excellent prop plane with good turn and diving capability, but to any pilot in a jet who can use speed and altitude advantages will absolutely destroy the spitfire 90% of the time. The spitfire is already a difficult plane to master and to face a plane used so successfully in the Korean war will make this plane even harder to play.