I totally understand what u're saying Leon, but what about blank back T206s and other blank back cards? TPGs should be TECHNICALLY assessing cards. Obviously that is just my opinion, as I can see your arguement for giving a higher grade for a card that is more pleasing to the eye.
The error is not in how TPGs grade cards (other than it should be 100% technical and therefore exact, but thats another topic),
but the fact that the hobby correlates a direction relationship between a slab grade and market price. Why do we want the TPGs to dictate what should be appealing to us? Can't we be allowed to collect the card and not the slab?
Next will be pinholes. Should a NM card with a pinhole be downgraded to Poor? Well, it has eye appeal! So we'll call it EX/MT. Unless its bigger than 1/16th in diameter or near the subjects face, then its just VG.
Eye appeal is subject. Like others have said, keep things objective! Its bad enough that, like Barry said, you can submit the same card 3 times and get 3 different grades. Imagine how much it'll vary when eye appeal affects the grade!
sorry for the rant
Rob