While i liked the Hades design, well the high poly model, It just doesn't fit why spend resources in trying to upgrade an old prototype design that wasn't tested or fully finished, with the latest weapons and what not, which it probably wasn't designed to be fitted with those weapons in the first place would most likely be a engineering nightmare and would take time to do. Prime example would be the Typhon as The Great War-era reactors of the Typhon destroyers lacked sufficient energy to sustain prolonged fire of these new weapons, rendering them prone to blackouts and reactor overloads (taken from Hatshepsut tech entry). Surely it would be cheaper and easier to make brand new ship from the ground up?
I just cant wait to see what new toys the Vasudans have in WIH 2.