This sounds very similar to returning to Set Affixes, specifically set resistances, that used to be in the game.
Patch 0.7.10 removed all set affixes in the game except set resistances – which bundled all resistances into three affixes: Set Elemental, Set Physical & Void, and Set Necrotic & Poison. These were then removed in patch 0.8.1 with this as the explanation as to why;
While your suggestion is not exactly the same, I’m not sure it differs so much that it avoids the same pitfalls that set resistances brought to gearing.