Lol everything with you is about the league. What about all the Serie A flops that succeeded in Germany from Boateng, Behrami, Jedvaj, even Donati got his fair share of play time. Ramos had 16 goals last season too in Buli. Serie A is defensive for teams like Juventus, not for Torino. Torino are the ones who are playing defensively. Immobile sucks against teams who sit back and absorb pressure, and Dortmund's technical ability is exposed, as they're just pace $#@!s. In Champions League where Dortmund plays like a small team, he plays well.
Like someone said, he can be a big fish in a small pond, but he'll never be able to take a team to the top.