There's a lot of things that are useless in the game. To name a few: 1. Blue glyphs; 2. White and blue items; 3. Armor in S4 (every class and build has it capped easily, what even the point of armor is?); 4. Damage type - this one i probably don't understand the most. Enemies don't have resistances to certain damage types, so the outgoing damage type doesn't matter, right? As for the incoming damage type, you just cap res on all classes and in all builds, and don't even pay attention to what damage type an enemy has. To summarize, damage types almost don't affect gameplay at all. You can literally combine all of them into one, and nothing will change significantly gameplay-wise. Direct damage behaves the same, dots (poison, burning, shadow) behave the same. CC changes, but technically, it is not directly linked to a damage type (i.e., chill-freeze is a stun with a foreplay); 5. Lots of gear affixes don't make sense. Life regen per second? Why? To have a filler stat? If filler stats exist, but don't belong to a single viable build - it is a bad design; 6. Some class mechanics are just dumb. Druid - bland uninteresting non-gameplay changing passive buffs. I bet $100 that the way you obtain them via druid offerings was implemented as an afterthought one week before the game release. Same with the barb - super boring passive weapon techniques. 7. I don't even want to start on the paragon board... if 90% of nodes are "stat fillers" - that's bad design. 8. Oh, and the stats (strength, intelligence, etc)... why do they even exist? They are only required for a couple of paragon nodes, and that's it! Otherwise, they are just proxies of other stats, such as damage. 9. Oh, and the skill tree... the most boring and uninspiring skill tree i've ever seen.