During the late 80s, almost every single game looked better on the Amiga than on the PC or any other machine for that matter. So I reckon that many software houses bothered to draw enhanced graphics for the Amiga, or at least add more colors. What made the expectation so unreasonable? Did LucasArts lose so much by investing on the Amiga at the time? I'm happy that Monkey Island on my machine never looked like this:
Of course I know that Sierra was mainly interested in PCs. I just don't think my wishes were unreasonable.