Ascension shouldn't have been implemented in the first place. If they want a 10 year cycle, old has to done away with and new has to be embraced. While some things, such as exotics, are too special to be forgotten, legendaries are grind-worthy and keep the game alive. Of course there need to be new things to grind for. If you could just keep your Fatebringer, Blackhammer, and Hunger of Crota at max damage for 10 years, you'd not only get bored, but you would also miss our on dozen upon dozens of new amazing weapons.