Get on the phone to Activision and teach them about these things called exchange rates. Implement OPTIONAL matchmaking for all activities. Make shaders, emblems, sparrows and ships options that are set once unlocked rather than physical items that take up vault space. This should free up vault slots for weapons, armour and items even if more vault slots isn't actually possible due to last gen restrictions. Put the Vex back to where it was prior to last nerf, buff auto rifles, cut range of Exotic Handcannons by at least 30% with significant damage drop off prior to that. Double the magazine size and impact of Necrochasm and make precision kills guaranteed cursed thrall explosion. Increase reserve ammo for NLB by 100% and further boost its precision damage multiplier to make it viable as a boss/ultra killer in pve.