It has paid off, with Seguin still able to have an offensive impact -- 22 goals and 19 assists -- along with a defensive one, resulting in a spot on the Central Division team for the 2018 Honda NHL All-Star Game.
On Monday, for instance, he was tasked with playing against the Bruins' top line, one that Seguin at one point played on during his first three seasons in the NHL in Boston, and held his own against Patrice Bergeron and crew.
That is no easy feat.
"The thought process was: That's the hottest line, I think, in the NHL and probably the best line," Seguin said. "We said we wanted to out-check 'em, we knew we'd be against them all night. Some games you've got to pick your spots for your skill to take over or to get that golden opportunity, and tonight it worked out."
It was a change, a different way of looking at the game. And with Hitchcock in place, it started the first game of the season.
"He's become a way more competitive player," Hitchcock said. "His compete level at the puck, his attention to detail, he's made big strides for me. He's made huge strides as a 200-foot player.
"We always use that term, but when you ask a guy to go from killing no penalties to being a prime-time guy, you ask a guy to block shots, you ask a guy to be out there at the end of games, important minutes, then play against top players, if you haven't done it your whole life it's a big adjustment. And he's made those adjustments all in half a season, which to me is terrific."
Not that it was assured.
"You don't know that going in," Hitchcock said. "It's kind of like I gave him everything, and let's see what he kicks back to me. But I gave him everything and he took it and he's run with it, which is a little bit of a sign of his character, which is a nice thing to see. You can't help but be impressed."
And while those on the other side -- the Bruins -- have seen the kind of goal that Seguin scored before, seen the creativity and patience and skill, these new aspects of his game are less familiar to them.