This was asked for quite a while ago and the Dev response was no. Their problem with it is that BLU changing spells is essentially like them changing jobs. And BLU can change spells in combat. So if you could quick swap your entire spell list you could essentially change jobs mid fight.

The obvious response to that is just don't let us use the quick swap in combat. But we never heard about it again. However, I can't remember when this was and it may have been under the old director. So perhaps Matsui would be willing to look into it.