No, we simply have it addressed that she is pro-Circle, and that she doesn't seem to agree with the Mage-Templar War.
We don't really know anything about it, so reading into her character that she disagrees with the cause itself at some fundamental level is pretty unwarranted at this point IMO.
I believe Vivienne already turned them down. "To this end, Vivienne defies those who may see her only as a social climber or someone whose power must be restricted, and even fellow mages who try to push her into backing the Mage-Templar War, a rebellion she does not support."
So far, the mages aren't really winning. They're just slumming it in the mud. Also, the line you're quoting is not what the blurb says. The full blurb:
"Referred to as Madame de Fer, “the Lady of Iron”, Vivienne lives up to her title. A leader among the mages and official enchanter to the Imperial court, she is renowned as a fearsome woman who achieved her position through guile and deft political maneuvering. Vivienne allows nothing to stand in the way of what she desires—not those who claim she is a social climber, not those who seek to restrict her power, not even her fellow mages who would conscript her into a rebellion with which she disagrees. Vivienne fights to restore order in a world gone mad…so long as that leaves her among those left standing, once all is said and done."
This sentence doesn't tell us anything about why she disagrees with the rebellion (it doesn't call it a cause). It doesn't say that she's opposed to the cause - free mages - but rather that she's opposed to rebelling because it gets in the way of what she desires. The rebellion is standing in the way of what she desires, so she's not onside with it. That's what this quote is saying. Not that she somehow wants the templars to get a few extra beatings in.
Based on that blurb, it certainly sounds like if what she desires - her position and status - is only possible by siding with her fellow mages, she's going to side with then.