I'm not really in support of Chantry-controlled Circles, I just don't think that having mages running around the countryside with no compulsory training is a good idea.
I don't think the mage rebellion is opposed to Circles per say, as much as they oppose being under the rule of the Chantry and the templars. After all, the vote was about the Circles being autonomous. Vivienne seems to oppose the mage rebellion, but it's not really clear why that is (if it has to do with something other than her personal power at court).
On this note, I would like to know more about how the mages in old Elven and Dales culture worked. What was the stance on blood magic? Was training compulsory? What happened when a mage became an abomination? What about weak-willed mages who couldn't resist demonic temptation? I like the idea of playing an Elven Inquisitor who supports that system, but it's hard when exactly how that system dealt with all the complications that arise from giving mages complete freedom is unclear.
We know that the Dalish Keepers are responsible for training mages and the clan are responsible for killing a Dalish mage that becomes an abomination, but this would not work on a large scale since it is so individual-based.
Merrill says that the Dalish believe all the ancient elves were mages, and that things were very different for them. The Dalish believe their ancestors were immortal, and that they were radically different; for example, the Arlathan elves could take decades simply making introductions with one another.
As for the Dalish, all the clans are different, but they seem to share some commonalities; they prohibit any magic that involves spirits, since they view all spirits as dangerous. The Dalish don't share the religious and cultural views that Andrastians have on Spirits and Demons, as you can see from Anders' religious debates with Merrill. Merrill says the clan kills an abominations if an elven mage has fallen prey.
Also, the Dales was a nation where elven mages were among the nobility, and they weren't controlled by mages, so I don't see it likely that a traditional Dalish elf would support the Chantry controlled Circles (especially given Ariane inferring that they played a role in defeating the Dales, and taking some elven artifacts as a result). To the Dalish, magic is a gift of the Creators that's supposed to be used. You could play it as an atypical elven Inquisitor, of course.