If I saw you talking to an SS officer, it doesnt matter the outcome until you tell me what you are doing. Until that point, you are flawed for talking to a Nazi.
Also, I understand that you're coming from the standpoint where you believe Shanks is evil or has ulterior motives, while I think the vast majority of evidence in the story suggests otherwise.
Since I don't accept your theory, I don't accept your flaw.
You need to actually give me concrete, unambiguous character flaws. Not speculation.