Nope, Giroux is still our best player right now.
The only thing working against him is age, but he's proven it isn't slowing him down yet. His bounceback was because he was finally healthy. The previous year he was still recovering from offseason surgery and the year before that he was injured, which is what led to that surgery.
2nd in the entire league in points and hardcore carried this team to the playoffs.... 8 goals and 19 points in the last 10 games for them to squeak in... that's what your best player does.
And two years before that? The decline had started, G just isn't big enough or fast enough to play center at a high level any more.
2012-13: 1.98 pp/60, Corsi 50.65, CorsiRel +4.63, xGF 49.95, xGFrel +2.84, Voracek 2.55 pp/60
2013-14: 2.08 pp/60, Corsi 53.22, CorsiRel +4.88, xGF 50.61, xGFrel +1.53, Voracek 1.93 pp/60
2014-15: 1.42 pp/60, Corsi 52.91, CorsiRel +5.92, xGF 50.02, xGFrel +5.45, Voracek 2.13 pp/60 [Hartnell leaves]
2015-16: 1.56 pp/60, Corsi 52.62, CorsiRel +4.22, xGF 49.66. xGFrel +1.57, Voracek 1.61 pp/60
2016-17: 0.94 pp/60, Corsi 51.96, CorsiRel +1.24, xGF 47.68, xGFrel -2.37, Voracek 1.43 pp/60
2017-18: 2.73 pp/60, Corsi 52.92, CorsiRel +4.51, xGF 55.35, xGFrel +7.51, Voracek 1.96 pp/60
If he was injured for three years, he's awfully fragile. 2016-17 is the only year where it's obvious injuries played a factor.
Otherwise 2014-16 looks more like a player slowly declining, because Hartnell leaving didn't impact Voracek at all, on the same line.
Notice his Corsi last season is similar to 2014-16, his xGF made a huge jump, hmm, didn't he play with a center with consistently high xGF?
His bounceback was due to being healthy, but also playing LW with Couts, everyone the last three years seems to play better with Couts.
One factor that may have helped the top forwards last year was Ghost getting healthy and Provorov playing a bigger role on offense.