https://www.bungie.net/en/News/Article/49853

At least with stuff you already had. But at least there's more weapons that can be used, which is good.

Here’s a list of adjustments to the world loot legendary weapons pool you’ll see with our November 24 hotfix: Remove all legendary weapons that hit their infusion cap at the end of this season
Add all of the Seventh Seraph weapons from Season 10
Add all of the Season 11 seasonal and planetary reprisal weapons
Weight drop chances so the newer an item is, the more likely it is to drop.