Gargoyle and Sandworm were too much of a pain to Banebow and Hunters in general, and Legion United had just arrived on the scene too. It was basically a buff to the Hunter class overall, since they...

Whoever reported Banebow + Reinforced Armor as a bug was wrong. RA should block it. That's how we designed it. (I'm pretty sure the "can't be reduced by armor or ally abilities" was my idea too!)