If you planned to do AT shuffeling, think again if it´s really worth the effort. This also means that the net cost of the Knowledge Point Books are now even more cheaper, since you get 50 AT back after using them (75 for gatherer´s). Since they reward 3 Knowledge Points, each of them still grant you 15 AT on top. You still get 5 AT from every Knowledge Point that you manage to obtain from other sources - including the list of open world items that u/Jeanssie, myself and a couple of other goblins are currently creating (btw will update on sunday).
TL:DR Bonus Artisan Mettle gained from cycling through professions got completely slashed.