I'm not sure about clan info editing, but I'm quite sure that officers can do most of what you have mentioned if the clan owner allows that feature in the clan settings. http://prntscr.com/slqmj4
Anyhow, I do think that officers should have the option to chance the clan logo, or make somekind of in-clan vote that could change the clan owner to someone else, for cases the clan leader is inactive and should get replaced.