Since the Templars would have refused all reforms, yeah, that was the only solution. At least from the mage perspective.
Tempted to throw a Kennedy quote in here.
First and foremost, one should take into account that, mayhaps, on this instance it wasn't a matter of the system needing reforms so much as the mages needing to purge their more violent elements who seemed more interested in blowing up people in the name of freedom than in seeking continued coexistance.
Second, give how Wynne, an extremely influential Enchanter, was working alongside the most mage-friendly Divine to diffuse tensions and introduce reforms, there is certainly no reason to believe this was an "now or never, all or nothing situation", especially since neither normal people nor mages are going anywhere. So, maybe bloody revolution in the wake of assassination attempts on the Divine was very ill-timed.
Kennedy spoke of mages and Templars? I had no idea he played Dragon Age.
People getting very upset over someone locked in a cage with a bunch of religious fanatics, some of whom have a taste for murder and rape, deciding they'd rather not be locked up in a cage... that is something to talk about. Fictional or not, it's fairly telling to judge such people harshly.
Never mind the fact, of course, that Circles are wealthy institutions that provide mages with a quality of life in many ways superior to what 99% of the Thedosian population enjoys with acess to free shelter, food, education, clothing, etc; that religion does not equal fanatism; that mages are in no more danger from Templars than normal people are from guardsman; and that mages have the capacity to kill people with their minds when they aren't busy enslaving them or starting Bligths.
Personally, I am more concerned over the possibility of mages with a taste for murder and rape living in communities where the nearest Templar is two days of hard ride away.