Emil Bemström is an NHL 3rd liner who currently leads Liiga in scoring and has been much more of an impact player than Puljujärvi has. That's the reality at the moment.
I think your reality is wrong this time. I've read a lot of critique from fans of Bemström's team (HIFK Helsinki) and from what quite little I've seen he's been pretty lame 5-on-5, clearly behind Pulju.
At even strength Bemström's got one goal and two 2nd assists in 7 games. He's scored 4/5 of his goals on special teams (5-on-3, 5-on-4 and 3-on-3). Bemström's also played two games more so Pulju's PPG is still better.
Pulju is +7 (the highest of the league with Kunyk), Bemström is +1. Last year Pulju had the best corsi in the FEL (62,2%), this year it's a bit behind with 59,1%. But Bergström's is 53,9%.
You don't have to like Pulju's performance, but you chose a pretty bad example with Bemström. Sorry this turned to Pulju this and that, that wasn't my point...