Every single one of Crawford's rulings in the feat article you linked are exactly what I would have said. And that's basically because all of his rulings are either based upon what the feat actually says or (in the case of Crossbow Expert) the real world necessity of (generally) needing a free hand to load a hand crossbow.
Do you think that you *wouldn't* get to use your Strength bonus with Polearm Master bonus attack? That somehow the feat gave a quarterstaff reach even if the feat doesn't say that it does? That a crossbow loads itself?
His ruling on Lucky is weird, but that's only because that's the way the feat is written. It's barely even an interpretation. It's just reading the actual English in the feat and applying it. It may interact strangely with advantage/disadvantage, but that's a fault of the wording of the feat, not what Crawford says about it.