That's kind of the way it is now, isn't it? (Destiny)

by Harmanimus , Friday, February 02, 2018, 14:54 (2517 days ago) @ CruelLEGACEY

As said below it doesn’t seem to be applied in PvP. But even then in PvE the difference within an archetype is usually about 5-10% on health and a substantial difference on shields (something like 70%) depending in weapon class/archetype. So even applying that in PvP where there is a 15 point health variance (0 to 10 armor) on a Guardian, you likely wouldn’t notice an appreciable difference anyway. A 450 Auto rifle would do about 2 more points of damage per round and a Hand Cannon might be doing 4-5 more per shot.

It would only matter if that is enough to reduce HTK with a weapon on whatever armor stat that Guardian has.