I like everything about this figure except for the truck cab. It just infuriates me. If the concessions to it were made for a reason that were critical for the other modes then I'd give it a pass, but they're not. Not in any way. The arms flailing out the back with nowhere to go is just terrible design work.

Essentially they've prioritised Orion Pax having rounded arms over the truck mode being complete. If Orion's arm design had been more squared, it would have been possible to make the arms transform further in some way. The chest panel just sits there too.

If Orion Pax isn't important to you and the truck mode is, then there's some scope to improve the look of the truck by removing his arms altogether (either at the shoulder or elbow), this cleans up and 'squares' the truck much better. However, there's still the ugliness of Orion's chest flap and head just sitting there, which is needed for the trailer hitch. The look of the inside of the chest flap could be improved by painting it blue colour-matched to the legs, and likewise I've seen some good improvements to the cab on TFW where chrome has been added to the wheels and window edges. Obviously, removing the arms too often will loosen the joints on Orion over time.

Apart from that big sook, I overall really like this figure though! All the other concessions are worth it for what is one of the most heroic-looking Optimus figures we've ever had.