Time for some armchair managing. I've read the changes to total parry (now known as Tank), and have yet to see them in practice. My war gladiator is doing well and I don't want to mess with success.
Some observations:
You would likely not use Tank when you are low on health. The best time would be when you have an adequate amount of heath to maximize your 'soak'.
Activity still reads as needed, but experienced players are running a '1', and getting away with it. I don't really follow this.
Parry, block and dodge still seem to live under one roof in terms of characteristics (agility) and strategies (parry-whatever).