I was given that by the Leviathan DLC + Extended cut, its not a good ending but it was average and acceptable, at least for me.
I see nothing wrong with the final DLC being a cheesy fanservice when we had already been given explanations towards what happens after the crucible as well as the origins of the Reapers.
The crucible being a superweapon plot was pretty much unavoiddable if they wanted the player side to win the conflict, since they pretty much wrote themselves into a corner as early as ME1 about how strong the Reapers where. I think it should just have fired the moment it connected with the citadel and skipped the Star Child bit entirely but i am content with what was given with DLC.