Are you referring the the max hp/ max attack tank set with ice/ground STAB, priority and SR? If it wasn't for the numerous bulky water types that also lurk in NU, I would definitely call it imbalanced. An interesting gimmick is to run endeavour and ice shard, which can effectively remove an opposing pokemon from the game. Since as the usual switch ins to Piloswine are bulky waters (which are important), this can cause a lot of problems for many NU teams.