Go to hell. I simply expressed an opinion of him writing it one way and then declaring it's something else.
It's a fantastic series and he wrote the ending as ambiguous. So I'm taking it at face value. If he wanted everyone to accept the ending a certain way then he should have fucking wrote it that way.
It wasn't that ambiguous to me. I saw the ending and in about 2 seconds I put it together as Wiener had (apparently) intended.
Don was sad.
Don had a breakthrough.
Don was happy and at peace.
Show commercial from an account Don had that was happy about about peace.
Where's the confusion there? Do need Draper to shout from the cliff "HEY! I HAVE THIS GREAT IDEA FOR A COMMERCIAL FOR COCA-COLA ABOUT SINGING! I'M GOING TO WRITE IT WHEN I GO BACK TO MY JOB!"