Fact of the matter is the Ontario Liberals and the Federal Liberals are like a pair of Siamese twins.   They weren't happy leaving Ontario in a smoldering pile of ashes they now want to do the same for Canada.  
Even if Meilleur was a good pick and qualified for the job she has already been tainted with her close ties to so many people within the federal ministries that picked her.  It is suppose to be non-partisan which is something she can't claim to be.