Only 2 ways I'd see these:
1) No Michael Fucking Bay.
The choice by Shia Lebouf not to participate is a solid decision on his part and saves us from his "acting". Besides, he's probably run out of ways to scream "Optimus".
This franchise needs new blood attached to it, Michael Bay really fucked these movies up in the worst possible way. These were not good movies by any stretch of the imagination. Period. They were just cool action with non sensical plot, horrible acting and pitiful attempts at humor. As someone who grew up with Transformers when they came out, it was nothing short of embarrassing.