How many classic have real graphical problems? very few. graphics are a part of the feedback and if you dont get any feedback you dont enjoy a game.
Try imagining smash bros with just the polygon characters. now take away the sharps triangles and replace it with the 2d shape of the hit box (which is not the character, its a lot closer to a box around the character). now take away the shinyness of the polygon characters. now take away their special hit boxes for the attacks and replace them with more boxes. also take away the background, the stage decoration, the dust, the hit explosions, the projectile effects, and the animations.
what u are left with is a very functional and fun game that would suck to play. graphics matter. they may only serve as a transportation for feedback to you, but if they cant accomplish that then they mar the experience.







