SoD_SP fixes bugs and errors that may occur when playing hardcore single-player maps, adds hotkeys, and expands functionality.
On one of the forums, guys in their free time are writing plugins to revive unsuccessful skills - Eagle Eye, Training, and a new spell mechanic for Camouflage.
Canceling plugins is a major blow to the entire community; in Heroes, it's not exactly a large and diverse community. I'm sorry, but this update gives the impression that the Heroes team is afraid that someone will steal their thunder.