I don’t think that is true at all. I think the Tempests, especially the dark gray ones, are the best looking aero caps they make. None of the aero caps look nearly as good as nice rims like the Arachnids, but they’re never going to.
The design of the covers is basically the same as the Gemini style they’ve had for a while now on the Y and on the 3P winter set. I like them better than the aero covers on the standard 3 wheels, and I think the dark gray make them even better (or “less bad”).
I’d love to see some newer even better aero cap designs, but I’m sure that’s not easy to come up with. Maybe if they put more emphasis on having a nice looking rim underneath so you can run without the covers most of the time, that would be a nice compromise. I don’t think anyone has seen the latest Tempest/Cardenio wheels without the covers (or at all other than the order page mock-ups).