Does Last Rite Really Unsuitable in Yvonne's Team?

people keep saying that Last Rite and Yvonne doesn't suit each other and their passive(?) clash with each other. Can someone explain? do they really unsuitable in one team? I've upgraded and invested so much on my Last Rite because of the End Game Content-Trimmed Medal thingy so it's a shame if she's not being used again.