The ii modifier (or something similar meaning the same thing) is a genius idea. For the burning, there may be some merit to having something to determine certain specifics of the burning move (i.e. whether the move is passive as well as active, and if it is, which piece has priority in a conflict b/w the burning pieces) with diagram parameters. XBetza wouldn't necessarily be able to handle those specifics on its own.
The ii modifier (or something similar meaning the same thing) is a genius idea. For the burning, there may be some merit to having something to determine certain specifics of the burning move (i.e. whether the move is passive as well as active, and if it is, which piece has priority in a conflict b/w the burning pieces) with diagram parameters. XBetza wouldn't necessarily be able to handle those specifics on its own.