Just a random opinion here not necessarily directed at you because I don't know your story. I'm just seeing all these delays due to the personal statement.
Unless English isn't your first language and you need major revisions on your statement, button that up and submit. I'm not trying to make light of the statement, but unless you've got an amazing story to tell (which you either have or you don't at this point), there's a ceiling to how amazing your statement is going to be no matter how you spin it and how pretty you try to make it. Most of us are pretty average folks and the statement is likely to not be a breaker or a maker in the process. There's a point where you just have to make sure it doesn't suck so it's not a breaker. I think too many people are intimidated by too many parts of the application and it paralyzes them.
As for you, your stats are nice. Very nice. Amazing, as you say. They really are. That's going to be the big standout feature of your application. A few schools might snatch you up just based on that. That's just how it is. Again, not making too light of the statement, I think you'll do just fine submitting any time. But I wouldn't sit on that statement too long. May as well interview when the weather is nice in Sept, Oct.