Nothing did, the 'extended cut' was literally shining shit in the grand picture as, regardless of what is done leading up to it... Nothing changes.
Had there been a grand declaration of something like: "We want to coninue things in the Mass Effect universe, so some events won't be changeable in the full canon and the ending reflects this." I would have been more leaniant, but we were promised an ending that showcases the impact of all of our biggest decisions.
Nothing did, the 'extended cut' was literally shining shit in the grand picture as, regardless of wh