Honestly if it was up to me, I think that I would probably make secondary fusions a PvE only weapon since my ideal version of how a fusion functions (think vanilla) puts it above a shotgun in every way aside from reaction time. But I would also make snipers more difficult to use at close range or while under fire and probably give shotguns back an effective range. And probably reduce special ammo by preventing people from keeping it in pvp when they change special weapons. This would still allow sidearms to be effective I think. Though I would probably buff their damage by about 5% at the most. And probably the range by about 20-30%. And for primaries I would probably try and find some way to balance out the thorn and TLW to make them a little less OP while maybe reducing the effectiveness of the MIDA archetype for scouts by about 3% or so. Aside from that, possibly a 3% buff to low RoF auto rifles. For abilities, the only things I would like to see is the secondary explosion from magnetic grenades hitting the same spot of the target the first explosion hit. And I would increase the damage of trip mines and shoulder charge to kill high armor targets in one hit. (Still won't kill targets with super active or over shielded of course Without the exotic)

well if they listened to some fans. I wont deny that many fans are just cry babies that want everything handed to them, but some fans have great ideas and criticism that bungie could really learn a lot from