I'v watched plenty of hockey over the years (well, I'm only 17) and I've never been able to figure out why the home team gets to change lines last. Playing in your home building doesn't dictate where your bench is to the defensive zone, who has the puck when the lines change, or who gets tired first. Common sense should say that when there's a chance, both teams switches bodies at the same time. So why does the home team get a split second to see who the road team brings out onto the ice?