People! You really need to not think too much about the so called plot holes in the movie. And use your imagination instead. If you can't make up your own theories/stories, then you shouldn't be collecting Transformers toys. Back in the 80's when I was a kid. I remember playing with my TF's making up my own stories with my Autobots and Decepticon toys. Making missile/gun sounds was great.
I took my 12 year old step-son to AOE yesterday and he came out thinking it was great.......'Awesome'....was his response when I asked what he thought of it. We got home and about 10 minutes later I could hear gun/missile noises (and other various sound effects) coming from his mouth. Yes, that's right!.........he was using his imagination, whilst playing with his Evasion Optimus and Galvatron. Just as I was when I was his age.
He could not give a toss if the plot was silly or nothing related to G1. My kid enjoyed it and made him happy and that is really all this movie needed to be.......and it delivered it in spades!

Oh, and he thought Optimus flying into space was great!