I never really understood the physical power behind the chantry as it sits. They've got Templars who are few and far between, actual trained ones would be fairly tedious to keep up having to keep their lyrium addiction under wraps. It was probably a over sight on the Dev team cause i know my warden mage would have more or less marched on the tower to free them if she had too. At that point the warden has access to not only the right of Conscription, but also really really good friend with some of the more dangerous people in the world. Amarantine could become the new mage capital of fereldon and probably be the more powerful for it.