The phrase "a much more ambivalent" is correct and usable in written English.
It can be used when discussing a situation, feeling, or opinion that has mixed or conflicting emotions or attitudes.
Example: "Her feelings about the decision were a much more ambivalent mix of excitement and anxiety."
Alternatives: "a significantly more uncertain" or "a far more mixed".
"There was a much more ambivalent relationship between Giuliani and the M.T.A.
As a result, Odysseus turns out to be a much more ambivalent hero than has been commonly accepted.
But it has taken a much more ambivalent position toward East Jerusalem, asserting that the city should be considered indivisible.
Whereas Crescas regarded the Aristotelian philosophers as adversaries, Joseph Albo (c. 1380 c. 1444), who considered Crescas his teacher, expressed a much more ambivalent attitude toward them.
Nobel prize-winning playwright and poet Derek Walcott, a native of Saint Lucía who has dedicated his artistic career to theater in Trinidad, professes a much more ambivalent attitude toward incorporating carnival and folk arts into theater.
Even Jimmy Carter, the Democrats' only other living former president -- one with whom the party has had a much more ambivalent relationship, and who all but backed Howard Dean over Mr. Kerry in the primaries -- used the most famous line from his winning 1976 campaign to throw his support to Mr. Kerry.
The Tories might be expected to be much more ambivalent about a country that has shown such a massive disinclination to vote for them since Margaret Thatcher and her policies turned so many Scots away from the Conservatives.
They expected the tour to be a gong-banging exercise for the Labour party, but we were much more ambivalent about it.
While he was an early, consistent and formidable foe of slavery, Lincoln had much more ambivalent feelings about blacks themselves, especially about whether they were, or could ever be, truly equal with whites.
Most Americans were enthusiastic about the transformation of their physical environments, but they were much more ambivalent about the religious, moral, and cultural implications of a scientific worldview.
Compare that with South Korea's new president, Roh Moo-hyun, who has been much more ambivalent about how to deal with the North.Still, there is a big difference between sharing America's concerns and actually being able to help deal with them.
