I guess the logic is to get you to grind lol, if they give you all strength then you need to either use armour and weapon cores to buy judgements chance packages in the hope that you will receive an armour piece with a different stat roll or use your etheric light to upgrade old armour pieces instead of weapons, since you can pretty much say you are limited to 6 etheric light a week if you done play PvP it's going to be quite a grind to get the etheric light, yes it can drop in nightfall apparently, I am yet to see one drop, and I run the nightfall more than 3 times a week, essentially if you want anything decent from this dlc you have to play trials, that's where it's all at, that's where they want you to spend your time