We'll never know, now, won't we?
Of course, even if Lambert did, the Chantry could have condemned him as a heretic or something. The Circles would have been seen as still loyal to the Chantry, and Lambert as the rebel flinging defiance at the Chantry.
Instead, the mages rebelling first simply lent credence to his claims, and fear to the populace.
And Lambert would have applied pressure until a new Divine was elected who agreed with his views. He makes it clear at the end of Asunder that that's what he intends to do. Lambert was never going to let it go, regardless of what the Chantry did, and there isn't a great deal the Chantry can do to stop him.
1- Only to a certain point. Otherwise, people will just keep claiming that they are not happy and if you keep altering the system to please them, it will mean the system is worthless. At some point, a line can't be crossed, regardless of how unhappy the people are.
2-You are applying a double standard here. You consider rebellion as a valid means of protesting against a system to enact change but, on the other hand, condemn loyal mages who were dissatisfied with the rebellion and refuse to participate or aid the Chantry/Templars.
1. True. But the point I'm trying to make is that the codex rightfully points out that there was a rebellion even in Feralden's liberal Circle, and that that rebellion was a sign of dissatisfaction. Clearly the Chantry did pay attention because Justinia was looking into reforming the Circle. What the codex then goes onto state is that the Circles in their present condition cannot function as they were intended to, which was namely to keep the peace and ensure these sorts of incidents don't occur. And clearly this is true since we see uprisings from the most liberal to the most stringent of Circles. To draw the topic back to Vivienne, cutting people's heads off and crushing 'malcontents', as she suggests, doesn't help matters at all. That's just oppression plain and simple, and since when has oppression not lead to revolution? Which is contrary to the point of the Circle in the first place, it's meant to bring stability, not incite chaos.
2. I only condemn loyalists for rendering null a vote that was agreed upon by all parties. Their rebellion is not the issue, the fact that they went and blatantly ignored a vote, is. I would have expected the libertarians to obey the outcome of the vote if the loyalists had won and I expect the same from the loyalists since the libertarians won. Rebellion is meant to be a sign of displeasure which leads to talks of change. The talks were had, the Templars weren't interested in change, a vote was declared, everyone participated, the loyalists lost and they should have done so gracefully. That's not to say the libertarians should just ignore their point of view of course, because that's also tyranny of the majority. But the fact that the Circle still exists, as claimed by Vivienne, is an affront to the vote which clearly dissolved the Circle.