Qwiss He's exactly what we said he'd be.
To be clear, this really isn't what happened.
At the moment of the deal, the anti-Madueke people said something like: "He has good underlying stats but look at how much he underperformed his xG. The underlying stats don't matter if he keeps underperforming his xG and everybody knows he's going to keep underperforming his xG. This is a big waste of time."
And the pro-Madueke people said something like: "G - xG is a random variable with mean 0. This is a stupid thing to get hung up on. Systematically under- or over-performing xG is not a thing for 99% of players."
Then what happened in reality is that Madueke outperformed his xG (vindicating the pro-Madueke argument) but his shot rate completely fell off a cliff (an anti-Madueke thing that absolutely no anti-Madueke person pre-registered as a hypothesis as far as I remember).
Either way, he's a perfectly cromulent backup right winger. If we can solve the mystery of what the hell happened to all of his missing shots, then he can be a legitimately really good player.