I actually really like the Silverbolt mould... as for the 'robot under a jet' argument - to quote the TF Wiki...
I do agree that the repaints of him have been ordinary... except the Henkei (which is the one I own) - that's amazing!Silverbolt transforms into a sleek, supersonic jet bomber similar to an XB-70 Valkyrie. His vehicle mode essentially has his robot body folded up underneath while his robot mode has the plane strapped to his back. In Silverbolt's defense, the underside of an XB-70 Valkyrie is a huge engine with a plane strapped to its back.
I'm glad I held off buying the Henkei (I also passed on Hasbro's original white version - terrible colours IMO), because this time Hasbro wins!! The colours are better than the Henkei - I love the blue cockpit shield, and finally he is red with grey arms... just like G1.