Yarde blows hot and cold but right now, he is playing very well for Quins this season. He does a lot more to get in to the game than Roko IMO and as good as Roko's first try was against Saracens, his other two were breakaway tries from interceptions.
Don't get me wrong, it takes skill and timing to score an interception try, but it doesn't make me think Tim Visser is the mutts nuts, so I'm not fully aboard the Roko hype train either.
Aside from the tries, I'm not sure he played well enough to justify all the hype he's getting.