You can clear hell and reach max level with a high DPS sword in D3 (and focusing on stats + 150-200 AR on the rest of gear). My point is that they intended to make inferno a challenge, not a difficulty level like the others (that's why you reach max level before entering), something like a "hard mode". If they meant to do that, our problem is lack of end game and hell being too easy. Looking the game this way, imo, things start to make sense (they still don't, but they start to...)
Problem is that people want inferno to be a difficulty level like the others. They ain't wrong, since inferno is a difficulty level, not a uber quest. After a couple patches, inferno is becoming less than a challenge, more a regular difficulty level, where you don't level up.
Anyway, people are upset with inferno - as a challenge (some say it's easy and p2w) or difficult level (some say it's impossible). Maybe the biggest issue with this game is - inferno is wrong, whatever it is... Imo, maybe we could be happier with one less difficulty level and tons of sidequests unlocked after level 60.
What's really really wrong with the drop system, imo, is the fact that a lot of people (myself included) never saw a set item, even after 200h of play. The rest is wrong, but not beyond fixing (even without fixing the drop rates, but fixing game mechanics). Also, AH should look (way) more like a "option", and the mf as is doesn't help a lot on this matter...