Sorry, but I disagree. Nothing intrinsically wrong with the sound. Idiomatic playing would have made it MUCH better. Play ANY electric guitar sound as stiffly, and it will sound as bad.

Guitars, and saxes. Probably the two MOST difficult sounds to PLAY correctly. But PLAY them correctly, and the sound itself is of much less importance. Listen to Jan Hammer making a Moog, for Pete's sake, sound EXACTLY like a guitar...
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An arranger is just a tool. What matters is what you build with it..!