The ending is terrible. You get a choice of "Red, Blue, or Green explosion." ME3's shitty plot holes and Bioware deciding to flat-out change random things about the franchise, could maybe have been forgiven if the ending was badass or amazing. The setup to it was pretty emotional, having you go through and conversing with you remaining and former squad members, the heaven bar talk with Garrus, EDI telling you that you made her feel truly alive, etc. And what do we get? The choice of our favorite color for the biggest cop-out of an ending in video game history. Onto the Leviathan DLC. The Leviathan can influence any Reaper, Organic, and other Synthetic with as little as a few minutes of exposure to the Artifacts. That entire Earth battle, the space battle? Didn't need to happen. Drop a few Artifacts behind Reaper lines and The Leviathan can throw the Reapers into complete chaos. Leviathan can make Destroyer class Reapers suicide (See the ending of the Leviathan DLC), can make the ground forces take each other out. It can make the Brutes and Banshees take out Cannibals, Husks, and Marauders, then each other. Eventually, there would be no more Reaper ground forces left on Earth at all, and barely any Destroyer or Dreadnought class Reapers in the space surrounding Earth. The Crucible would be rendered useless, so then Joker would never have to leave with the crew,? stranding Shepard. The God Child would never get to show his stupid little face, and the Reapers would be gone. Any future threat by him attempting to rebuild a Reaper army would be caught now that the entire galaxy is aware of and accepts the Reapers as actually existing.