Honestly I really don't know why Bungie decided to do that (besides the obvious and mind you - stupid, strategy seen in recent months: let's just give everything to everyone on a silver plater with hopes that maybe it will boost the player numbers...). Enhancing additional perk columns, barrels, magazines and origin trait as the Tier of weapon increases should be enough of a bonus. Giving additional perks for column 3 and 4 starting from Tier 3 and having 3 options on Tier 5 did 2 things (especially seen now when Tier 5 rains from every activity including the most basic and easy ones like Solo Ops): 1. It killed the GOD Roll chase almost entirely as you will have some kind of GOD roll on a max 3rd drop of a Tier 5 weapon. 2. It completely killed the whole Adept concept making all Master Raid/Dungeon and GM loot chase obsolete. Now Bungie needs to come up with some kind of workarounds to make the high level content loot meaningless like additional, extra Origin traits... and all you needed to do is just not give extra perk choices for all weapons...