Well, I think this should be really big priority for Bungie, cause Joker's Wild almost month away. We all know we will get 700 power level and have to leveling up again. I grinded so much guns and armor for the last two months, so I have 60 cores and this is not enough to bring all my stuff to 700 power lvl.
I masterworked only 25% of all my gear, cause I can't let myself spend cores I have. Is it stupid? Of course.