How is your crit like as shadow? It affects you quite abit so if its way lower than your haste values then there is an unbalance. As your in pvp gear I cant really see if you have gemmed and reforged correctly.
I rule of thumb though. Dont go OVER the hit cap. Its not worth it. Rather be slightly under than slightly over as its a waste of stats
The reforge rules are pretty simple after you get hit capped.
if it has haste and crit leave it as it is
if it has haste and mastery, reforge mastery to crit
if it has crit and mastery, reforge mastery to crit