In the example shown in the photos (not the illustrations) of TFA, the awkwardness of the design comes from trying to compress the aggressive/sporty front end shapes of Mercedes' current line of ICE models into the smooth silhouette of a range-optimized EV blob.

There's a lot of visual conflict between the two motifs, as shapes that normally have boxy, sculptural depth get squashed down into basically 2D features on the surface of the smoothed out, mouse-like volume of the overall package.

The designers seem to have been stuck with the assignment of putting a Mercedes mask onto a wide, flattened jellybean. The result is mostly successful from the side views, but seems pinched and overwrought from the front.

Additionally, some of the grille shapes on the front are likely vestigal, as EVs don't require the same ventilated cooling as combustion engines. Much to the frustration of car designers, one of the key identifying features of any brand has historically been the design of the now obsolete front grille; the functional purpose that served as an aesthetic starting point is now gone. (You can trace the gradual acceptence of grille obsolescence in the evolution of Tesla's designs.)