I'd argue that's a reason NOT to do an SS Optimus if the main thing wrong with ER is that the trailer is a bit small. The base figure is close to perfect and not worth updating again. I'd rather they focus time and energy on other characters.

Plus even if they did do an SS G1 Prime, there's absolutely no guarantee they'd include a trailer considering ER is the first time they'd done it in CHUG after so many years.