Good suggestions. I think only 2, 4, 5 and 7 are possible though. As for one, there already is a way to lock the neck plate in place, just look at some earlier posts in this thread, and I don't see how they could extend the neck easily without compromising fighter mode. For 3, they'd have to make the landing gear bays longer, especially for the front gear, and I don't really see that happening. As for 6, even for the 1/72 the Cockpit is exposed, so I think that is a design issue more than anything else.