If Sunsetting is here stay, it should be based on earn date not season.
In bungie decides they want to stick with sunsetting they should make it based on earn date not the season the weapon is from. This way people still have to chase new weapons like bunige wants. But at least all loot we get will be useable for a year. This also solves the issue of us getting reissued gear. As long as the gear is earn able in game, you will have a year to use it.