Yeah, I think Seider will eventually become the bigger impact player, but that's no guarantee, and I know a lot of people would doubt that he ever gets to that level. Which is why I think it would cost Seider, plus to get Laine, and that I definitely wouldn't do.
This is an old cliche that doesn't always hold true. We've seen purely offensive teams that lack defense, win the Cup. We've seen top defensive teams get bounced in the first round. You need a bit of everything, a well balanced team, to go the distance and have a chance to win it all. Having a big, mobile, number one defenseman definitely helps, but so does a solid two-way, point per game, number one center, or a half a goal per game, top line winger.