Here’s the German middle market take on design rationalism.
The main intention with this seems to have been to spell out its aerodynamic credentials. Hence the flush glazing, door handles and partly covered rear wheel arch. Commentators here note that it was not different enough from cheaper Opels such as the Astra. This is partly an effect of the shallow pressing and lack of relief but if you look closely you’ll notice the door frames are nicely finished in anodised metal.
Opel would also have said that the Omega replaced the middle-market Rekord which was a Spartan car too; the Senator B handled the higher end of the price spectrum and looked more distinguished. I would agree, the rear lamps are simply cheap looking.