Is it just me, or was Babs usually drawn with bigger gobangaloos as Oracle than she was/is drawn as Batgirl? Could this have been because the artists thought that it was the only way to show a disabled girl as attractive? This is just speculation, of cours

This stuff is always tricky and each artist does it differently, sometimes Oracle was downright Power Girl-esque.

With Batgirl, she’s much younger and she’s supposed to have more of a dancer’s figure (ballet), which still could mean many different things. 

As I say, this stuff is always tricky. I want a variety of body shapes in comics, and every artists seems to bring their own feel to it.