The issue with this logic is that people already pretty much required a full team of gjallarhorn. People like to make sure the target really really goes down. People can die, be out of rockets etc etc. Still to this day I still see people requiring a full team of gjallarhorn for crota hard. Most people have no clue how many rockets are required to bring him down, they just nuke all they have to make sure. This nerf will make other rockets more viable, not the other way you think. The guys who required 6 gjallarhorn will still require 6 gjallarhorn. And when one day another weapon arise, or build or item or whatever it may be they will require that instead. Weapon balance should not be dictated by threats. This change is a needed change, even if you cannot see it right now.