the problem there is that RNH really caught fire on McDavid's wing to finish the season, and McDavid publicly said he likes the combo. RNH also gives us the option of playing Draisaitl on McDavid's wing, another combo that gives us an option other combos get cold.
Now, of course that is a bit a luxury, while the defense issues that Faulk would solve are a pressing need.
However, we do have Bear and Bouchard coming, so Faulk would be more of a stop gap. I think there is a trade out there that involves RNH and Faulk, but there has to be more to it than that.