Sphaero you should know better than myself that Marco Reus had a very inconsistent season. Where was he in late October, November, December and parts of early 2014, when BVB was in deep trouble? I remember plenty of games where Robert Lewandowski was the only decisive force in your Dortmund team, with plenty of games where he set-up chances for his teammates left and right, while very few others were able to.
Marco Reus deserved his title of the best Bundesliga player, because of his start and finish of the season. Both were extraordinary, while Lewandowski struggled a little towards the last 4 weeks. However, in my opinion over the course of your season, Lewandowski was more influential and important than Marco Reus. Especially when your team's strong collective play was not working as intended.