I'm sure that they will give relic/mythic/emp weapons as an option only if they plan to do fundamental changes to them. So far I see no reason to make them accessible as they obviously are working as the dev team expects them to. As far as war is concerned, they want to make sure the nerf isn't an over nerf or breaking something else on war, same goes for sch changes. Last thing anyone wants is a bunch of people rushing over to the test serve just so they can use items that don't actually have but want to try out. Giving access to the WoE version of the gaxe allows a war to test out the impact of the nerf on the WS still and in most cases there is access to a vast majority of good gear already to allow a person to test the intended content. There really is no need to let a person play with the best weapons if they don't correlate with the intended test content.