Seriously, I guess we all stopped complaining about this after we hit max light but it's two days into the update and I'm already out of cores when I've just been sparingly infusing. It's absurd how this is still a requirement when they are still such a pain to get. It's not an "investment" it's just adding to an already infuriating power level grind by forcing us to use garbage gear that drops.
Bungie had the opportunity to fix the issue. They told the player base to 'blam' off by just renaming MW Cores. Bungie told the players 'our way or the highway' so do not expect a change in the infusion economy any time soon. If the player numbers drop to post-CoO levels then MAYBE they will consider it. Your choices are a simple A-B problem. A - Stop playing and stop paying Bungie. or B - Continue playing and deal with it.