On the up side, i am sure a customiser will come up with a way to use that cockpit as the robot chest.
I agree (and i think the outside of the forearms sans-armour are hollow too so the armour isn't that optional). Surely a Takara version will have better paint.
Jetfire's collarbone region also appears to be a void - are there any good pics of robot Jetfire from above looking down?