Kekäläinen's known for being harsher on Finnish players, not for favoring them. Of course, he passed over Puljujärvi but he also passed over Sebastian Aho with pick #29 in 2015. As such, that logic's wrong.
On your assessment on Kemell, if you're using this tournament, I agree. He's displayed bad hockey IQ, and is a giveaway machine. Constantly takes too long to make a play with the puck, and loses pucks all the time. But he did play better in Liiga early in the season. It's a difficult thing - who do you think is the real Kemell? If I was going by this tournament alone, I'd have his ranking plummet, so it indeed is strange how people see his ranking increasing with is play in this tournament. But I guess that's because I focus on the overall game rather than just scoring.
The way I see it is, Kemell from early in the season is a #1OA or at worst a #2OA player. But his play after he returned from injury should drop his ranking. The question is, how far should he drop? What is the real Kemell? Was it a fluke or can he get back to that level after a healthy summer? The only way this tournament should INCREASE Kemell's ranking is if they weren't watching him early this season. Because he's been far worse.