All heavy BS powercores are still quite broken, in my opinion. Heavy battleships that already have armour advantage over some of their heavy opponents have now also got a powercore advantage. Legate vs Bismarck is an example (Legate 2.45 mils hull, 385K recharge vs Bismarck 2.9 mils hull 430K recharge). The Ishtar and the old Marduk also fall out of line with their combination of high powercore AND high armour, as does the Nephilim (albeit the Zoners aren't at war with anyone except the Noms). The Deimos is borderline, as it has a medium hull for a heavy BS, but still a very strong powercore.