I got the weird impression while reading this thread that people hold onto writs for long periods of time. Like, what reason could there possibly be for that? They're dailies, you just do them lol.
Ah, master writs slipped my mind. Yes, those ones I suppose you might hold onto, I know I've got one on my crafter that I picked up ages ago but haven't done due to lacking the Nirnhoned trait research.
I would imagine that for those it would only point towards the actual specific crafting table you need for the set in question, right? If a master writ is pointing you to every available crafting table, that seems like a bug or oversight.