It includes the excellent FWE developed MMM menu integrated into the main mod, and updated for new RC6 features. This also fixes the exponential scaling issue when using Dynamic Player Scaling (this was related to the fact the menu for MMM in FWE was setting MMM globals as non-constant, which is necessary for storing options from the menu in a savegame, however the player scaling code expected to them to be constants. Integrating the menu allowed me to cater for menu and non-menu users).
There's also an updated FOIP FWE-MMM plugin in the thread, which is necessary when using RC6 Beta with FWE.
RC6 is largely a bugfix release with the exception of the Soft Unleveling and Dynamic Player Scaling features. I suspect Soft Unleveling will become a default option, as it adds a tremendous variety and challenge to the game. Any feedback is welcome in the thread.
Mart