I thought the Megatron/Soundwave sculpts looked OK in pictures, but Optimus just looks wrong. It's the position on the arms that does it. I'm sure there'll be a better aftermarket version at some point.
Looking at the side by side compare on pinball news, it seems like it could be another decent pro. The biggest change in flow is likely the Megatron shot not having the extra little ramp on the left, but it remains to be seen how essential it is to the gameplay. The soundwave locks aren't likely to change the flow much, and might actually give you less chaotic feeds.