Spell casters will use a mana pool to cast with. (See Jake or Ed until they update this post)
Any class can use any weapon. Same rules as stated in the book as starting proficiencies and penalties. Players can add any weapon they do 100 points of damage with the -4 penalty as an additional weapon of proficiency at any time.
Party will use party roll instead of individual role in large scale combat. (party vs more than 10 creatures)