Evolving is nice and all as long as it doesn't look like shit. A good chunk of Bayformer designs are terrible and don't even look like the characters they are representing. That's not called evolving, that's making an entirely new character who happens to have the same name. A good example of evolution is something like TFP—regardless of what we think of the narrative of that show, the character designs are faithful to the characters they represent while still retaining creative liberty here and there. The designs don't have to be 1:1 to G1, but they should still be instantly recognizable to the average fan without being told beforehand.