Nah, I just added extra explanation to SPI, saying that it dictates both magical power AND control. Dex is mainly for doing precise physical things, as to not be confusing. If you want a spell to zoom through a crack in the wall, then flip, fly, floop, into the next room and into a monster's mouth, that is all SPI. Though if a situation were to come up, say, like you wanting to cast a spell in the split second of a bullet flying towards you, then DEX would certainly have a role in it. 

But what are the chances of that ever happening... right? Haha... > u >;;

...

B-but, if we had a Discord, what would happen to my beloved OOC? I can't abandon my poor child... D^: