It should really be more accessible in end-game activities. It's not like putting it in Master/GM NFs and Trials is a freebie or some kind of handout. I just want more potential sources of Ascendant Alloy to earn instead of mindlessly farming Master KC, Master Wellspring, or Master WQ story missions.
I feel like this would dilute the drop rates of other items like Ascendant Shards. What about adding it to Master Lost Sectors as a potential drop? Would make Master LS more appealing too. Just a thought.