RNH was always a cerebral player. Even in Red Deer. Some junior stars are just better athletes than their peers, but not really Nuge. You could also see that in his rookie season with the Oilers as a weak / undersized player but with great instincts and creativity. If he doesn't go down with injury that year, he wins the Calder by a landslide.
Unfortunately, it was Dallas Eakins who kind of hammered that safe/ defenisve-first mantra into RNH (to his detriment IMO). It's no surprise that he kind of cooled-off mid career and many Oilers fans were left wondering "that's it?!".
Thankfully the Oilers drafted two all-world centres and thanks to a Bill Peters experiment at the 2018 IHWC, we later learned that RNH could be an excellent LW. Shifting to the wing has allowed his offensive game to shine again.