The horrible D:OS artstyle seems to not have been placeholders after all. So I was right. Everything continues to look exactly like a D:OS game and nothing like a Forgotten Realms game.
Taking a look at the WoTC official material from D&D beyond and the monsters manual anyone can see that they made a pretty good depiction of the creatures
I sometimes wonder if people do know how D&D5E´s creatures, uniforms and the city of Baldur´s gate actually look like before making comparisons...