Francis has some advantages of his own though. He, unlike OTL Charles V, would be permanently in the Empire. As such he should be able to address the underlying political issues sooner and better, simply because he can have a kind of focus, OTL Charles never could have had to begin with. Religiously an ATL Imperial variant of the OTL French Gallican church with the Roman Catholic Church, would not be unwelcome either. Religiously a less powerful Emperor, ironically enough, might be able to get Contra-Reformation reforms sooner. That would not totally stop the Reformation, but it would make it less popular, since this would address the issues, even Catholics agreed they needed to be changed. To put it differently, it will slow down the spread and in some cases might even prevent it gaining dominance in certain OTL regions.