Hi, I main a Warrior using the GS for the most part.
Currently HB is great in PvE and very impairing/useless in any PvP setup (unless you build your whole character around it).
Here is how I’d make it useful in all settings.
HB becomes faster (4hits+final blow perhaps?) and allow movement but halved damage.
Arcing Slice (which currently no one uses) would ramp up in damage a bit to make it worth using, and Fury effect would also apply to nearby allies; this way we also improve on Warrior lack of support.