Forward group is right around his age.
Stepan - 26
Zibanejad - 23
Kreider - 25
Miller - 23
Hayes - 23
Buchnevich - 21
Lindberg - 24
Fast - 24
Yeah he definitely fits the age of the Rangers forward group and the Rangers definitely have a good forward group. Their defense is still horrid though, they have almost nothing long term outside of Skjei and McDonagh (maybe McIlrath, I don't know where he'll top off at). They desperately need to get some puck movers on defense, they won't be a serious contender until they fix that.
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Until the Rangers actually fix their ass defense, they're not a contender. I don't see how that's a very controversial opinion. They have nothing long term on defense (outside of Skjei and McDonagh) and are plagued with horrid contracts to Girardi and Staal.