Yeah I have been doing that too. I got 3 unique staff nodes on the last reroll, to no success of course.
I will probably grind this character to 100 and then uninstall. The crafting is a little too PoE for me. The pool of affixes is deep enough that wading through items, even with a restrictive loot filter, is tiresome. I have found maybe 2 good exalted items that I would save for a 3 or higher legendary potential unique. I have made one legendary item that I actually wear, the rest have been busts. I have found two items with 3 legendary potential and one with 4. They are, of course, useless to my build.
There has to be a balance between Diablo 3-style class focus loot, and the endless piles of worthless shit that drops in PoE, but LE has not remotely found that spot.