It is interesting--I guess I don't have a handle on how much Susan hung over with the ISS outside Teatime of the Strange? Especially with all of Umbridge's crazy rules this year.
It's also interesting that he DID consider Ginny. While Dolohov prides himself on his ability to read people--and is certainly quite good at it--he apparently hasn't read the relationship with Ginny and the other Weasleys all that closely or noticed that they really don't move in the same circles--and that Ginny has been quite vocal in the past year about feeling abandoned and has come to him with her naked ambition. Perhaps he believes too strongly that family/blood demands loyalty and that's blinding him? That could also be why the Weasley twins made it on.
no subject
It's also interesting that he DID consider Ginny. While Dolohov prides himself on his ability to read people--and is certainly quite good at it--he apparently hasn't read the relationship with Ginny and the other Weasleys all that closely or noticed that they really don't move in the same circles--and that Ginny has been quite vocal in the past year about feeling abandoned and has come to him with her naked ambition. Perhaps he believes too strongly that family/blood demands loyalty and that's blinding him? That could also be why the Weasley twins made it on.