I trust him. It's as simple as that really. Only GM I've ever lived with us having that I've actually fully trusted either. I'm hard-pressed to find many GM's in the league I'd trust as much as Hextall right now honestly.
Our forward prospect group isn't as desperate as people make it out to be anymore. Rubstov, Konecny, Laberge, NAK, and Lindblom all have relatively good top six potential even if only one or two of them have high level scoring potential. Then a glut of guys who could make good bottom or middle six talent in Leier, Fazleev, and an assortment of names you might as well pick out of a hat at this point. Giroux doesn't play a speed or goal-scoring centric game so, short of his body falling apart, I doubt he'll age badly. Couturier and Schenn are both relatively young still.
We can always trade other assets at D, G, or draft picks to add at F. Regardless of it all, I trust Hextall. It's the biggest concern for our team right now, the aging of our forward group not meshing well with the rest of our organization, but it's not a thing I'm afraid of with our GM. If it were Homer, yeah I'd probably be afraid.