Accuracy is pretty much the most viable thing in the game, so stacking it makes sense. That's why they nerfed Priest's spell - +20/-20 meant engaging mobs way higher level/going through any defences possible.
Although they did not touch drugs
Yep. The problem is that having drugs, consumables, pets, resting bonuses, means you can stack shit up way high
before gear and skills come into play. The real answer would be to get rid of resting bonuses (I mean what the fuck why would you have these), pet bonuses, then work in more interesting drug maluses because nobody worries about the drug crash when you can rest all the time.