So the extended cut got released and me being the mass effect nerd as ever, I still had my mass effect 3 copy installed since the game got launched in expectation of this event. And my opinion?
LOVED IT. It changed everything for me, especially the fact that they now clarified many of the uncertainties and that they've shaped the destruction ending to be considered as a "bad and only last option" by dialogue (Sheppard points this out). Control, the one I went with even before the extended cut, became immensely fantastic in my eyes. You can't say now that mass effect didn't have an original ending not to mention very interesting. As for synthesis, well I still think it's very weird and unfitting. It's so indie sci-fi-ish I can't even describe it.