User blog comment:Cosmyn5991/Mass Effect 3 Next DLC/@comment-1786741-20130129054733/@comment-24174486-20130129131653

To quote Wikipedia, "A plot hole, or plothole, is a gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot, or constitutes a blatant omission of relevant information regarding the plot."

Not knowing what happened to a few characters does not constitute a plot hole.