I *really* wanted to see Jetfire in jet mode just flying along for a few secs---up high, low across the desert, whatever---just show us a Blackbird on the big screen.
Fighting Starscream would have been a very cool bonus. First movie showed SS is quite adept at transforming, flying, and fighting all at once---surely Jetfire can too. Or at the very least---just have Jetfire simply out-run SS! Just show us the speed and power of a Blackbird at some point, in some way.