Moving will be made to interrupt spellcasting at a point in time...

[Nakiamiie]

Here are a few posts from Yoshida about the spell casting changes.

Good post from Yoshi-P!

　“If /facetarget is not used, minimize the negative hit to graphics quality”
　　　　“If /facetarget is used, prioritize performance over graphics quality”

That's a good balance.