it was such a satisfying solution because Ed did a huge sacrifice but without killing anyone or dying. and he moved on. he lived his life just with theoretical alchemy at most and he and Al were happy and loved

he went from an insufferable little shit who thought he was awesome for being an alchemist genius to someone who knew it wasn't the end of him, and alchemy isn't the solution to anything

it's fine to be a muggle. look at the things his friends and allies can do without it! it's fine. Al's body >>>> power