Just get this in the Legacy Collection (2024) whenever that goes on sale, this 30th Anniversary DLC is included in it.
There really isn't anything in this that's compelling aside from the Dungeon Experience/Dungeon Armor (and Gjally if you have no other good heavy weapon options). The rest of the paid cosmetics/emotes you get from this pack (you still have to unlock them in-game) are pretty underwhelming.
The earnable weapons from the free-to-play activity are really just a waste of time. There are much better weapons to farm for and plenty more engaging things to do in the game other than Dares of Eternity. Not to mention, the droprate and odds of you being able to unlock crafting patterns in the activity are so incredibly slim, it would take hundreds of hours playing the same thing over and over just to unlock all of the recipes to mediocre weapons, no thanks...
If this is the only DLC you need and don't have the Legacy Collection, I wouldn't buy this for more than $5.