In this instance I disagree.
See Gould, p59 (near top): "Unless conditions are cramped, [unison] notes of different duration take a dot beside each notehead".
Hum, right, I've checked the page. For some reason it was more obvious in my head... Maybe I had in mind "adjacend notes" p.56...
Finally I'd say both are acceptable ans depends on the editor's/ publisher's choice.
And in any case the tweak is more readable and looks better to me.
Thanks Paul, I should have checked before responding.
Cheers,
Pierre