This change was not wanted nor needed. It simply makes using the GTN more of a hassle than it needs to be.
Before today's patch searches only behaved this way on a few categories: gifts, mounts, relics etc. I think what most people were hoping was that the "any" rarity was just broken for those categories and that they would be brought in line to function as the others do.
But for some odd reason we get the opposite? Why alter it to be less convenient? Also if this was intentional, why is there still an "any" rarity at all now?