I would love to see Banshee have more uses.
Here are my ideas:
1. He sells items called telemetries. Consuming one, say a pulse rifle telemetry, increases pulse rifle drop rates from all activities. This will really help players focus in on what they want to grind for.
2. He can reroll one perk on a gun. This might help players find more value in their loot, while having the limitation of preventing players from forging a God roll.
3. Armsday bounties that are farmable, allowing players to farm for specific gunsmith weapons.
4. Bounties that can apply to any activity and drop specific weapons from those activities. For example, player gets a pulse rifle frame. He acquires data from Gambit, so Banshee makes a Bygones. These bounties could also be given to all vendors instead as well.
5. Reroll or outright choose the masterwork on an item. With cores wanting to be removed from infusion, this might provide them with an alternative use.
There are probably more ideas, but this is a start. Lemme know what you guys think!