You can't underestimate how important it was for SV to score the first goals. The goals allowed SV to play more conservatively on defense and not expose themselves too much to NW's attacks. A packed in defense against NW stood a much better chance defending the goal than potential break-away attacks from NW's deadly forwards. If SV had to have played catch-up its likely that NW would have exploited the situatiom as it did in their first match this year.