I'm glad to see Wheeljack again but I still think he should have been somebody else. Although Prime Wheeljack is not G1 Wheeljack just like Prime Arcee isn't G1 Arcee, at least Arcee in both incarnations was a fighter in the front lines. That said, I think Wheeljack should have been cast as a weaponer/tinkerer of sorts; upgrading the Autobots' weapons systems and could have been Ratchet's long lost friend instead of Bulkhead. An episode could end with the kids stumbling upon a previously unknown cavern in Autobot HQ which would reveal... fossilized dinosaur bones! Now that's an homage to G1 I would like to see!
Now what would be fun would be to see the brothers Sideswipe and Sunstreaker and they could be cast as twins instead of just siblings. They could be Bulkhead's long lost friends.