So what? That doesn't mean that people can't work out new ways to manipulate magic, create new spells that affect the world in unique ways.
The core concept of magic is drawing the energy of the Fade into the real world and using it to manipulate it. All that it takes is for someone to think of a new approach for the study and use of magic to take a new direction and invent new, possibly better ways to utilize it.
If you're going to insist on splitting hairs between magic and spells, I must insist that you do the same between science and technology. The progression from musket balls to bullets isn't science. Science is a methodology, technological advancement is its product. Magic is energy, a spell is a way to manipulate it. That Alexius' spell required the breach is not the point. That was only a power requirement, the point is that he created something entirely new, that advancement and new ways to manipulate magic are possible. Other advancements needn't require such overwhelming power.
But magic, this manipulation of energy, does run on rules in the setting. As long as it runs on rules it can be studied, understood, predicted and manipulated. That's what science is all about. And just like any scientific understanding of the universe, those rules can be disproven and reevaluated.
The basic procedure that allows the discovery of a physical law is the experimental method.
For a given phenomenon can be identified those which may be the fundamental magnitudes, and it performs the measurement through a clear and repeatable method.
The law is a quantitative law, that is expressed through the language of mathematics, that is the operational definition of a physical law assessed by the scientific method,which lead us to technology.
Technology is science since its methodology pertains to it.
Which are the fundamental magnitudes of magic?
Magic is not energy.
Energy is a property of objects(And cannot be separated from them by a "veil" ,not a property of the "fade" like magic) which can be transferred to other objects or converted into different forms, but cannot be created or destroyed.
Summon Animals,lighting bolts,fireballs from nowhere is not energy is magic.
Which are the fundamental magnitudes of magic?
Its unit of measurements?
The breach was not a power requirement for Alexius,since he manipulated the time itself,and as far as i'm concerned time can be only influenced by gravity and the speed of the subject,but in no way this will lead to a time travel.
-But magic, this manipulation of energy, does run on rules in the setting. As long as it runs on rules it can be studied, understood, predicted and .manipulated. That's what science is all about. And just like any scientific understanding of the universe, those rules can be disproven and reevaluated.
Magic is not energy,and it does not run on any rule other than wish and dream,it does not possess any fundamental magnitudes and cannot be studied with the scientific methodology,like the writers through some vocal mages like Dorian,Solas,Morrigan,ecc.. would lead us to believe