It would be great to have InControl's experience functions (setxp, multxp, addxp) available in FxControl.

Potentially fun applications:

• XP on breaking ores
• XP on breaking mob spawners
• XP on breaking Thaumcraft's loot urns and chests
• XP on breaking Pam's Harvestcraft worldgen gardens
• XP on harvesting crops (right click)
• XP on extinguishing fire (left click)
• XP on building (place block)

I second that, I came to look if it was already suggested
It would be very nice in some custom pack, or even just to allow for more/less XP on certain block mining