Until he proves it, he's just a good prospect.
OK, snark aside...
OP's trade was definitely over the top in terms of value to Philly, but given our positional needs, that's exactly the type of Godfather offer it would take for us to say yes to a deal. We can't accept fair value, because we absolutely have to have the skill set we expect Provorov to bring.
Edmonton, of course, can't offer that much for him, despite the fact that they would obviously benefit from what Provorov brings (and, given that offense is not the Oilers' problem, I think they'd benefit more from having Provorov than they would from having either Draisaitl or Puljujarvi, though clearly not as much as they'd benefit from having both of their guys.)
All that being said, I do consider Provorov to be a prospect on roughly the same level as Puljujarvi, and given our needs, would rather have him than either one of the Oilers being offered. If we could be more sure of Sanheim reaching his potential, the equation might be different, and a one for one trade might make more sense. As it stands, though, Edmonton would rather not give up on their high picks, and Philly would rather not trade a player at a position of relative weakness for one at a position of relative strength, so there's no deal here.