So basically you dislike nearly everything that makes him what he is? He was sold in a window box...
Most of what you listed are legitimate gripes (not sure about the Princess Leia comparison though. Or the Seeker comparison. Or the Henkei comparison) but to me he's really nifty.
He showcases what I imagined as a kid what a Combiner would be: small robots transforming into a fully realised and imposing robot. Up until I got Energon Bruticus Maximus most of my Combiners felt lacking.
They connected sure but they didin't become something more. I adore my reissue Predaking but Damn! he just stands there, slumping under his own weight. Sure slumping and ominous, but slumping none the less.