The Ars Magica-derived Mage: The Ascension has rotes -- pre-designed spells as an option to use rather than making stuff up on the fly for this reason. (Ars Magica may do it as well; I don't own the game.)
That said, once mages get used to combining elements -- and no mage will have access to all elements of magic at all power levels -- things do speed up. In the example, Stephen would know that he has power over matter and distance, but not time, energy or entropy, for instance, and would be planning to dissolve an enemy's armor or rusting it solid, for instance, or spying on them at a distance.
The magic style allows more flexibility than Vancian casting, but it's still constrained.