>>6164187That's because they're aliens. They have different organic structures compared to man-made robots. Some of them even have healing metal.
But in what Anon was saying, the CG effects lost their luster when in the original trilogy, the bots' kibble was shinier and thus looking realistic. In AoE, Crosshairs seemed a bit jelly because of how organic he looked and that Lockdown barely looked like he transforms into anything. It had even worse reception than what the old Bayformers designs had, which was why they decided to revert Bee into his old tried and trusted design. It was also why they made Hot Rod look like shit as well.
Aesthetically, Drift is probably the closest to the older designs, as well as actually being a homage to his original character themes.
