Oh, nice question. And thanks for the message! I’m sorry if it took so long for an answer but it’s always hard for me translate my ideas. 

Well , for sure his first thought would be something like “oh, lucky boy, you  definitely don’t have your father’s face”.

And no, Eugene doesn’t believe he’s responsible for his father’s acts, he’s already got his revenge there would be no reason to vent his anger on Nathaniel (even if he would yell at him at the first complaint about Howe’s destiny). And if you’re asking if Eugene would feel some mocking pleasure to conscript him, yes he would.