Since Summerset I have personally seen a very large drop in the chance of a receiving a survey from top level crafting writs. I have completed approximately 80 writs since SI launched and have received precisely 2 crafting surveys.
Before SI I would receive usually 1 per day for the 10 top level writs I do across two characters, around a 10% chance. Now that % sits closer to 2.5%.
So I realize this could be just bad RNG, but with 80 rolls of the dice it is beginning to feel pretty unlikely to occur just by chance (but still possible).
So I am just wanting a general feeling of what everyone else drop rates are like right now. Please reply whether or not you have seen a dip.