Change how? The only thing that makes him tough to play with--that he processes the game too friggin fast--is the same thing that makes him the best player of his generation. You find guys who can think and react fast, you don't tell him to do things slower to prop up some guy who can't.
Sure, that might mean a plugger like Hilbert will work better than a skill guy like Christensen every now and again, but that's tough **** for Christensen.
Moot point anyway. If Kessel struggles with 87 for some reason, our fallback is Hornqvist, who we already know doesn't.
You're kind of blowing one comment out of proportion. Sure, who are any of us to question this generation's most spectacular talent? That's an easy position to defend.
But Sid could stand to have some puck patience "added" to his game; a little Ryan Getzlaf if you will. No, that doesn't mean refrain from using his breakneck speed to torch a flat-footed defenseman. It means don't always move at breakneck speed just because you can - always doing anything can become predictable.
I lost count of how many posts last year stated, "when was the last time you saw Sid beat someone 1 on 1?"
Throw in some speed changes every now and then, dictate the pace, but more importantly change it. Don't let this generation's Chris Therriens find an ability to skate as fast as they can backwards and dart in front of your space (obstruct) as you try the same speed move you did the last 6 chances you had - go warp speed at a defenseman, throw the puck at his feet, and try to bull your way through him.
When your alternative is 2015 Chris Kunitz 20 feet behind the play then sure, have at it and see what happens, but now that it's Phil Kessel IN the play, yeah, Sid should absolutely consider adapting his game to make the team less predictable, and ultimately better. To your point, Sid is so talented that him "adapting" or "changing" isn't going to suddenly be unsuccessful - he's a generational talent.