Plain and simple the prime time for those raid (“lairs” *cough cough*) is passed and they exist solely to be channels for those catalysts. You can’t get random rolls from items that drop, and the items (weapons) were the same for 3 raids. If Bungie moves the catalysts from these raids, incentive to do them is entirely removed. Whether they will move them depends entirely on the answer to the question “Does Bungie care about engagement in these old raids?”