I don't think we can expect much from Macron regarding Greece or European austerity as a whole. It was the same thing five years ago, where we had Hollande give a series of superficial indictments of austerity but cave in to Merkel basically immediately after he was elected. I may have missed something, but overall Macron is already less outspoken than Hollande in his criticism. He may disagree with the current economic policy in the EU but I don't think he will throw much political capital behind breaking Germany's hegemony on these decisions. Until Germany's voters decide to remove Merkel and Schäuble from office (which seems unlikely), we unfortunately remain stuck in austerity.