The problem of martial art in DA is like i mentioned the world is diverse, unlike our real world, of course we have a lot of different races with different size but we are all human, sharing the same weakness, the same advantages and the same way of thinking actually. Surely "races" in DA are not the same like us in real world, the differences are too extreme.
Dwarf martial art surely not be the same at all with human martial art, because their size are extremely small and extremely short, fighting among them will be no problem, but fighting other races? The effectiveness of their martial art technique will be questionable. Surely a human will not benefit learning dwarven martial art, and also true the other way
Not to mention there is a creature like Qunari who have horns, surely their weakness will not the same as human, their head and neck will be stronger, their skull will be harder, they can headbutt anything with no problem. So attack to the head and neck with punches and kicks might be not effective at all, no matter how strong the punch and kick is. Not to mention they're giants, to face them will not be the same as facing the same species opponent.
Each "races" will have different martial arts that are extremely differ from one another. Every martial art must be fit their physical and purpose, every martial art must have techniques to counter every "races" physical, it will be too complicated and don't much making sense unless every races since the beginning of time already having war with each other to develop such art
But in weapons and magic, all these are null, because weapons and magic just simply cover all the things. The only thing that matter is how much damage dealt in successful attack with the said weapon and magic. So logically in the world of DA, there will be no unarmed martial art because weapon technology and magic already defeat the purpose of having unarmed combat. It is easier to beat any "races" by using weapons and magic than to develop special unarmed technique to beat each "races"
Example, for a human, which is easier to fight a bear? Using spear or fighting them with punch and kick? There is no martial art in the real world to fight bear, lion, tiger, snake...ect, we simply use weapons.