Really disliked what was done with Rodan in the Heisei series. I felt that Rodan should have remained a suit. As a puppet, Rodan is stiff, and not much can be done with him. On film, it always looks like he's moving slowly because the puppetry is executed so poorly. As a suit, Rodan is a much more robust creature. You have the model for flying, and the suit for cool melee brawls. Cutting Rodan's size down and keeping him a model really ruined the character for me in Mechagodzilla II. It reduced him to pecking at Godzilla's head and flying around him in circles. I consider it to be a lame fight scene.
Aesthetically, no real complaints. I prefer the Showa and Millennium Rodans to the Heisei incarnation, but I don't find any true flaws in the Heisei Rodan. I simply have a preference for the other versions.
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