I think right now he's probably better than Ederson. Which worries me for January, let alone summer, as some clubs could come knocking on the door for him.
What reassures me (to an extent) is that you can already safely presume Van Nistelrooy is well aware that there's a possibility Hermansen leaves and they're already succession planning for it...
He's quite clearly our best player right now. And that's in spite of conceding several goals which aren't really his fault.