So I just had this thought that can potentially make bramble/thornmail better
Instead of the current iteration of grievious wounds that only effectively counter healing from auto attacks turn it into an active where it shoots an aoe of spikes that last for a while shutting down all forms of healing on all enemies hit. To compensate for this change the damage reflect portion will receive a buff.
While on cooldown the armor reflects significantly less damage and vice versa when the active is up again leaving the power of choice up to the player.