Combat is really boring right now, and there's potential to stalemate in a fight very easily.
If you are not running with zigzag and steal thunder you are very unlikely to break the defense of someone who is actively putting up their maneuvers, and parry/shield up makes this very easy to do.
You can turtle up and defend forever if you really want to.
At the moment there is a small set of abilities which can be used to actually break defenses in a 1v1 scenario.
https://youtu.be/NWzMrCXB3TU