Yeah the extended cut is a must, it's like a 10x longer extension of the ending, resolves a LOT of questions and leaves enough ideas for the universe as a whole to continue.
All the galaxy isn't stranded in our solar system anymore, they all return safely and the relays are still ok, hell in one of the ending shepard basically becomes the protector of the galaxy and overlooks the reapers and helps fix the damage and the relays so life can resume as normal.
All the galaxy isn't stranded in our solar system anymore, they all return safely and the relays are still ok, hell in one of the ending shepard basically becomes the protector of the galaxy and overlooks the reapers and helps fix the damage and the relays so life can resume as normal.