not sure if this has been asked/answered yet but in terms of gladiator will the prot bonuses be converted to shield charge instead of shield block?
Yes, for two-piece. Assuming wowhead is correct, then 2piece just includes Shield Charge as well as Block; for 4piece, Glad adds "Shield Charge increases the damage of Heroic Strike, Slam, and Revenge by an additional 20%," onto the set bonus.