Nothing that ever stopped John Eaves. Forget the Scimitar or even the Breen cruiser, a regular Starfleet Sovereign is covered from bow to stern with these so-called "greeblies" (that's the green guy from Star Trek 11, right?There's no ship nor station in TMP that is as greeblied out as this, though the office complex and epsilon station have more than the Trek aesthetic previously established.
So, now we're eliminating great spacecraft designs for Trek because it has too many details?
Keep in mind, it's possible to maintain the TOS Starfleet asthetic as smooth and largely detail-light, and still allow for vessels from other polities and other times being more detailed, or having different propulsion types.

For my money, detail isn't a bad thing. Especially when the details are functional.