I wish there was a toggle option to turn off smart loot or maybe something like in WoW where you can choose to get loot for an off spec. So if I was on my DH but wanted to try out a WD or Monk I could just turn the loot over to that class. I certainly remember better than anyone how much loot sucked back in the day and being hard to gear out your character. Smart loot was a godsend but did they ever think maybe people wanted to play more than one class? Right now the only way to really do this is farm blood shards then switch over to the class you wanna gear out and spend them. This works great for armor pieces but not for the more expensive Weapons and Jewelry. Since you can only do the quest for a free set once it makes gearing a new class out pretty hard. Also they made sets so damn OP that they are pretty much 100% necessary. I tried taking a fresh 70 and then gearing them with crafted armor trying to make as many set bonuses as possibly. I also tried taking good drops I got on my main and then reforging the main stat over to the new stat of the class I was making. The result was still a pretty garbage build that couldnt do much past Torment 2 or 3.
I agree gearing up followers can be annoying with smart loot. I usually just spend all my blood shards and a lot of crafting materials in the cube to gear an alt quickly.