I don´t think Imu actually gets involved in like, day to day politics. I could be wrong of course, but it doesn´t seem like he really follows the breaking news or events, and is probably focused on bigger things like, bloodlines etc.
I assume the Gorosei would have different opinions. In Egghead it was made clear from Saturn and Mars that the official government ideology is that humans are like insects, you can kill them and they will eventually reproduce, but they have shown some diversion for whatever reason. Saturn originally decided to leave Bonney alone and Mars told Lucci he wasn´t necessarily interested in saving the cipher pol agents, but he did eventually do it. So it would just be a matter of what the Gorosei decide, based on how useful the admiral is, and if they think the ¨accident¨ could happen again or be covered up.