I know this post is from more than half a year ago, but I'd like to point out here that it's very easily possible to still vary the rotation into Armor Crush on the regular even without the buff extension aspect. The most common method of doing that is by attaching a DoT to it (ex. Chaos Thrust, Demolish, Goring Blade, etc). Since they're removed the DoT via Shadow Fang, they could easily attach a DoT to Armor Crush instead. Setting the DoT at 30s would cause Armor Crush to be used as often as it currently is. They could easily tune the damage so it's worth using in ST but not in AoE, or attach a non-stackable bleed to one of the AoE abilities (or a new ability, like an alternative combo off Blossom).