why do so many people make simple things hard?
for me, it's obvious they made the spells take a few seconds too long. all they had to do was reduce it a bit to make it a better component of the game. i shouldn't have to rely on anything else to allow me the time to cast certain spells. plus, like it was said, the expert level spells are much faster and so the gap between the two is too large.
do i think master levels should take longer? of course. but, they went overboard.
That's a very good opinion. I respect that you feel that way. However, I disagree, I don't think they went overboard. And I certainly don't think that it's obviously too long.
You say there shouldn't have to be some other skill in use for you to cast a master spell, and you're right. However, there isn't. I regularly cast them without having to resort to something else to protect me. However, people seem to think that they were intended to be used in the thick of a battle when surrounded by enemies, and that's not the case. They are useful just before a battle starts, before the enemies are coming at you. Cast it, and watch the mahem.
When the enemies start coming after you, switch to a dw spell so that you can stagger them. The expert spells are your stay weapons. The Master spells are just icing on top to add to the carnage. They certainly were never meant to be your primary weapon.
You can even tell this fairly clearly by the fact that most of these spells are duration, AoE spells. AoE and DoT spells are never intended to be the primary weapon.