This was not the case with this ship. It would have been one thing if the base shape had been retained, and the details altered to fit the era, but that's not what happened.
Oh, good grief. We're talking about an illustration on a fake certificate in a fake museum display that's just to promote the show. It's not like it's an actual hero ship. It's an incidental detail in something that isn't even onscreen. I'm done wasting my energy arguing over something this stupidly unimportant.