Assuming Gunther retains, do you think he should win clean or with help from Ludwig Kaiser?
Part of what has made the Gunther character so strong is that he does not need help to win matches and retain titles. He does it on his own and does it decisively. After he defeated Priest with help, winning a second match with help would set the wrong tone for the title reign and fly in the face of what worked for so long in the first place.
Fyre and Dawn should retain, if only because history tells us divisions get hotter when there is a heel champion that babyfaces can chase. Belair and Cargill lost the titles without being pinned.
If they lose again in Berlin through further chicanery, it only gives fans a greater reason to get behind them. If they roll through the champions and regain the titles, what does it prove, advance, or improve? The tag division has long needed better stories and booking. This is one way to get there.