Current gear will remain good for a while. It will take time for new loot to roll out that will replace what we have right now. I could see some weapons like sudden death, velocity baton, hezen, praedyth's, and no hesitation never being replaced, because their perk/origin combos are so strong that they will be worth using even at a 10% deficit, and those combos on those archetypes may never come back on "featured" gear. Keep in mind that 10% damage is like one surge. It is there of course, but the REAL TANGIBLE impact on gameplay will be negligible for casual players. It may affect contest level content where there is a serious combat challenge and you will miss the damage. Outside of that, you can probably use what you have now for a long time. The change will not hinder your ability to do strikes and normal raids/dungeons with your current gear I can promise you that. Yes I know its more of a "this FEELS bad and lazy" complaint rather than an actual "this will severely affect gameplay" complaint and I understand the sentiment. I agree that not allowing the rite of the nine dungeon weapons to be enhanced to tier 5 was a catastrophic miss. The rolls on those weapons are pretty trash compared to what we have now but being able grind for a shiny adept prosecutor with voltshot to take into the new raid at tier 5 would have been a great way to roll out the new system and incentivize engagement with the event. They literally did this with into the light and it was a resounding success. It is shocking that this was missed.