I think this Aspect should function more like one that protects teammates, similar to how some Titans use Stronghold and Swords to draw the boss's attention and shield their allies.
Therefore, I suggest the following adjustments:
When equipped with Ursa Furiosa and Unbreakable Aspect, the summoned Void Shield will no longer gradually drain grenade energy. Instead, taking damage will cause it to release a shockwave (similar to a sword’s Flash Counter, with a cooldown between activations).
This way, in PVE, it would function similarly to a Titan wielding a sword with stronghold, allowing them to draw aggro from certain bosses.
However, this might disrupt PVP balance, so I propose that when using the above gear, player-inflicted damage on the Void Shield should significantly drain its grenade energy to prevent unlimited blocking.
Why didn’t they just make it use the Class Ability instead of grenade? That always baffled me.
It seemed like just a simple change to let it make the barricade energy into a kind of a mobile cover with a little offense capability too.