I’ve got an Epi Bonamassa “Treasure“ and haven’t had the need to change them. They seem to have a nice usable range for me. If they are scratchy, perhaps some contact cleaner will help. Not sure if they are open shaft or not. Great guitar!
Here's an article about the post production on Celebration Day. Jimmy's guitars/amps had varying amounts of EQing and solos had added reverbs/delays.