in anything competitive, there is always a "must use". its not so much a Bungie is making it so, but rather, the crowd will always champion something specific. mostly though, its the something that is clearly the best option. it was some specific guns before (SUROS, TLW, Thorn), but its been getting better now (just PRs in general, and now sort-of SRs). its an ebb and flow that is very difficult to predict and control, so that means there will always be balance changes and that nothing will ever be "perfect". flat-out going back is'nt the answer though, and a single person (like yourself) definitely doesnt have the answer. maybe though, its not the weapons that should be changed, but rather guardian HP.