Potter has had a lot of challenges thrown at him and he's overcome many - breaking down the low block is a challenge all top clubs that can dominate play have to learn, and its glaringly obvious - but there's also no reason to believe that this challenge can't be overcome either.
It doesn't need to be Potterball that overcomes this. It could be Potterball mark 2 where for instance we play the long ball more often or something along that ilk, You know win ugly sometimes. I'm not saying use tactics like that too much, but if it counters teams playing like Sheff Utd surely its worth having in our armour.