Some Primal Extreme battles, such as Titan and Leviathan even more so, requires you to reposition yourself very fast.
You can do this using Sprint to help, but it takes away all your TP, making this option not viable for Disciple of War, who require TP to cause damage or keep aggro from the enemies. This gives Disciple of Magic a very big advantage.

Are there any plans to have some magic/skill that uses all your MP rather than all your TP in order to balance DoW and DoM on this aspect?

It could be called "Float" which has been present in Final Fantasy lore for decades, which would make you levitate and increase your movement speed.
This would make so much sense since most Disciple of War classes/jobs don't need MP for anything at all.