Well, like I said, you have to take into account his position. When he first came onto the scene there were some who were like woah this guy is so good, why not use him as a winger too? but I always said that for a winger he would be terrible, so yes, for a winger his technique isn't good.
Extremely relative judgments/barometers of technique aside, you can't deny that the player in that video looks totally different from the one we've seen the last couple years. Maybe it was simply he just started fast but that wasn't indicative of his actual level (ie, small sample size), but I have problems with that conclusion (namely that the sample size is bigger when you take into account his time with the youths which looked just like the player in his first season, not the player in these last two seasons. I'm inclined to think it's something between a Ramsey-like crisis of confidence and not ideal training methods).