Well it's worth 5$ then yeas. Return to Ostagar was nice thing. I have all DLC for DAO. But if they sell you game for 20$ (this is what i pay for DA II in promotion) and then try to sell small sidequest or stupid sword for 1/4 price of the whole game - forget it.
I'm 95% sure that I will not buy this DLC.
Any good DLC ? Well... actualy Witcher 2 have them

It's not because they are great. 2 sidequests and bunch of items it's now what i call good DLC
(still Troll Trouble is kinda sentimental because it's clear situation from the book - soneone say to Geralt that there is a Troll under bridge when they talk about old and new times, he ask if he should kill it like in old times, but guy say that people like this dam thing because he always fix that bridge and take only small fee for crossing).
What was great about that DLC is that they are for free :-) And they already said that there will be few new DLC to Witcher 2 in next weeks - also for free.
So DLC is fun, long and give us really something worth our time (then it's good) or it's add a quest or something, some items or new location and it's free. Just to keep game alive longer.