Krazy Weekend where an exotic weapon can be inserted in each slot if you wish, Maybe every 3 weeks or so if really popular. Double Dip…..any Brick will fill Special & Heavy at the same time - could be a permanent Artefact choice but it costs 2 to select it, or again, you (Bungie) could choose when it can be activated for an event, week, weekend. Don’t think any of these 2 would be too difficult to implement. Some things could bring back players just for the fun of trying out something new.