The point isn't whether he is good enough or not. The point is, if he is the best possible option for Finland. Of course he will be an asset, if he is chosen, which he will, cause as you stated Kummola does have some power. From the view of his development, as I said earlier, I'm not even sure if it will do him any good. There will be a lot of pressure, since he did do really well last time. And it's home WC. So, if he doesn't play well it will do more damage.
If I was Jalonen I'd probably not take him, but a lot depends on who will be available from the NHL/KHL.