There are some strange arguments in here about not using Vincent on low prov bronzes. It doesn't matter about the Prov value of the card you target (unless you're vastly overcommitting - see below), it's more about the current (or even potential) point value of the target. For example, you are absolutely not going to use Vincent on Wild Boar of the Sea, even thought it's a 12 Prov gold, and this is simply because the value you get of 4 isn't worth Vincent's use. However, a Fallen Knight at a value of 18 is absolutely value for Vincent; and on that note, using him on the 4 value base version might also still be value in a long round 3 since you are removing likely high potential point threat. It's not about prov to prov, it's about winning rounds, and using Vincent to remove a low prov bronze threat can absolutely be value if it's central to the win condition of your opponent.
Another example is the Tridam infantry which can get obscene value if left to grow and mature beside an engine. It might only be 4 a Prov bronze, but it can wreak havoc if left to develop.
Where i think people are getting confused is term 'overcommitting prov' and if you over-commit your golds to win a round vs an opponent who has only used bronzes, then yes this can make winning subsequent rounds more troublesome.
In terms of my overall opinion, I think VVM makes Veil rather defunct when playing against NG. Veil was supposed to be a counter (or antidote) to poison and yet what's happened is poison is effectively as strong as it always was and this is because playing Veil against NG just sets you up to be VVM'd. Has anyone seen that Order card that gives Veil being used (Marlene De Trastamara)? VVM is probably the reason why no one has...