I don't see game optimized at all for 16:9... Look the size of that meter. No skies at all. On Andrews its sky, on Olympic you cant tell where is the branch.
what is your desktop monitor resolution set at?
while I agree the wide screen 16:9 ratio looks off... it is not nearly as bad as you describe on my monitor. if you tweak the resolution it alters the viewable area... since most phones and tablets are built on a widescreen ratio, I am sure there are monitor setttings that can accommodate that layout, similar to the way a TV has various options for watching a movie in different formats.
I still prefer the 4:3 ratio myself but it doesn't fill the whole screen but it is far bigger than I would have or look at if I were playing on a small mobile device.
also, unless you are someone who utilizes multiple monitors or computers a smaller game window allows you to pull up any notes or calculators like Kat's or Bilko or Pinhunters.. etc... I think it is going to make coin games in the high stakes rooms more competitive than they are already...