Easy way to fix everyone's problem. Put a node on every primary that acts as the upgrade. What element depends on the kind of item used. If they make it difficult to obtain the elemental upgrade mats, but allow for any level 40 primary to be upgraded then everyone is happy. As a side note I still pretty much only use one primary.. About the only time I switch is during the raid so in all honesty this tactic of theirs doesn't even work