We can look at the MoP beta as an example

We can look at the MoP beta as an example of this where when Black Arrow had a 2 second cast time and was reverted to instant because of it force delaying Explosive.(edit: Toning down instants and putting more emphasis on casted shots simply doesn't work for po world of Warcraft us when our combat design is basically a melee DPS's gameplay but on a ranged class.)

Limitations on casting while moving is great and is necessary but it makes me wonder how this will impact our class. Our entire gameplay design will have to be changed to accommodate restrictions.