Raids with more than 40 members should now be impossible.
Major change regarding dungeon "Charges":
Everything has been migrated from a global value (based on the sum of the raid members' Availability stats) to a per-character charge value that is directly linked to each character’s Availability stat. This change should prevent several issues and allow multiple raids to run smoothly.
Save compatibility should be maintained, but issues may occur due to changes in the character table structure.