I have a problem with my in-law . . .

[Nilpaurion Felagund]

I think he did pass the sceptre to Miriel- (the phantom)

I think he didn't.

If Pharazôn is as headstrong as you think he is, wouldn't he have challenged the rule of Tar-Palantír outright? He commands a majority in Númenor, and could have used that for his imperial ambitions. But he didn't. He respected - or at least feared to oust - the holder of the Sceptre. Seeing Tar-Palantír dead without properly passing the sceptre gave him his chance - it is easier to challenge a law - especially a radical one made for personal reasons - than a living person, I think.

So he might be determined. But I don't think he would challenge a Tar-Míriel, Ruling Queen of Númenor.