After completing the season pass you should get both bright engrams and old seasonal ornaments and have them alternate every five levels. I stopped playing destiny after warming so I missed all of the seasonal ornaments before season eleven. When I started playing again I saw all of these cool armor ornaments and asked a friend how to get them and was disappointed when I heard they were no longer available. So instead of just vaulting these amazing ornaments that the artist probably spent a lot of time on you should let people reacquire them with some work. You could make it so that every five levels the player will alternate between getting a bright engram and one random ornament from the past seasonal sets. This would not include the eververse ornaments and hell you could even make it cost 5-10 dollars to get a deluxe season pass that allows you to get old ornaments after you complete the actual season pass. The possibility to get old ornaments would give people incentive to play after completing the pass which is one of the biggest problems in destiny right now. You could even make it so the ornament you receive is class-specific to make the grind even longer. Adding a way to get the ornaments back into the game will incentivize both new players who never got any of the old ornaments and old players that may have missed a few to keep playing when they finish the seasonal content. This idea could also be a way to monetize old content that you don't have to do any additional work for.