But really, apart from the runewords being too strong all the qualms I might have with items, stats (energy not being useful), or almost any system in the game is pretty much just nitpicking.
It's no surprise that proponents of D3 can be angry with it, seeing how there you had maximum power at a whim with no downsides. You can respec into "meta of the month" build at any time without sacrificing anything for it and all the progression really boils down to:
1. Go up grifts until you're no longer one-shotting everything
2. If you're no longer one-shotting go level below and grind it until you get the same gear but with better stats so you can one-shot higer grifts
3. Rinse and repeat
I don't know, maybe around rift 100+ this formula changes but I didn't really have the patience to go that high and it didn't really seem to change at all. Also, when you're doing hundreds of billions of damage the game looks very much like a joke. I remember I was doing one of the act bosses on Torment 11 or 13 difficulty (that's like Hell times x in D2) and I didn't even get to see him as my random meteor (passive skill that drops meteors at random from time to time around me) killed him before he showed on the screen and his entry dialogue was still playing when I was looting the corpse. What's the point? Where's the fun?