The 1.14 client can still suffer from engine-specific lag or stuttering under heavy load. Sound Driver Buffer Fix
While the 1.14 client was designed for official Blizzard servers, the "Classic+" private server scene has increasingly adopted it to provide a more stable experience. Project Ascension (Bronzebeard Realm) : The recent "Bronzebeard" realm, a Classic+ experience Wow 1.14 Client
The 1.14 client has a built-in 20ms input lag buffer to simulate old CRT monitor latency (by design). Fix: Go to System > Advanced > Enable "Hardware Mouse" and set "Max Foreground FPS" to 1000. Wow 1.14 Client