Well Prime has been looking like the way he looked in TF1 since at least the G2 era, granted the flames are new, but if you look at a couple of the Generation 2 toys, even Armada and later Primes weren't cab over tractors. Even though that style does work well for a limited transformation, but I don't have too much of a problem with his current look. I just wish they gave him his iconic gun instead of a simple "tube" cannon instead of a hand.
Although Arcee is 3 bikes was a rumor I wished was false. She was never a combiner. Plus it completely invalidates the Arcee toy from the last movie. Unless Arcee is more like A-R-C for Arcee, moonRACER, Chromia?