Out of curiousity, I checked the game topics which confirmed that at least here people often saw it in a different way. There were several games with very positive comments. Sure he's had better and worse games. A quick googling also gave the following picked comments:
Edmonton Journal:
(First a lot of talk about excellent corsis and other underlying stats...)
Nothing anywhere in there to suggest the 18-year-old is remotely hurting the team, even as those production numbers are nothing special. The eye supports those numbers, as J.P. has looked good-to-excellent on the defensive side of the puck for a player of his tender age, and has shown occasional flashes of brilliance with the disc on his blade.
Oilonwhyte.com:
Puljujarvi has had moments of greatness and has proven to be capable of playing in the NHL.
Puljujarvi has also been a factor on the third line, and also contributes on the power-play. He’s a big body that needs to add more physicality, but he definitely brings speed into the lineup.
Though he is not getting as much ice time, there are circumstances and flashes of his play that make him useful up with the Oilers. He’s not making too many mistakes, and he is giving 100 percent effort night in and night out. Edmonton shouldn’t fix what isn’t broken, and therefore, should keep him in the NHL.
McLellan:
“He’s got his legs back in LA. He was quick, on the puck and he got excited to play with Connor. Like any 18 or even 20-year-old in the National Hockey League, they have to find consistency. There’s nights when he’s very dangerous and others when he’s not.â€
And again at Oilonwhyte.com (before the 1st line stint):
Puljujarvi, on the other hand, has probably been one of Edmonton’s three or four best players over the past week.
The 18-year-old Finn has the speed to keep up with the Oilers captain and possesses a powerful one-timer that is tailor-made for McDavid’s incredible on ice vision and otherworldly playmaking ability.
And like Kurri, Puljujarvi plays a solid two-way game and possesses and has a dangerous shot from the top of the circle.
I'm now ready to leave this topic as it's okay that not everyone agrees with me. I just wanted to point out that he has had NHL level games or if not quite a few people have been wrong. Please don't take this too seriously, as I'm not here to start a war. I know there are different opinions and that's fine.