There are Destiny quirks to un-learn at the meta level too. Engrams and rewards used to decrypt at a light/power level commensurate with only your equipped gear, so if you weren’t prioritizing light level (for which there are plenty of valid reasons, especially in PvP), you had to remember to switch to that gear before decrypting anything or you were limiting the potential of your drops.
As I understand it now, engram light levels are fixed (discounting some slight but consistent randomness) when they drop, and it’s calculated based on all your gear, including things you’re not wearing and gear in your vault.
So you don’t have to switch outfits just to decrypt things or worry about your drops—you’re always getting the best possible drops based on your current potential. A welcome improvement.