J
No. Shit. There are only a handful of 'viable' (as you say) builds in Hell in D2 - I would be absolutely shocked if there are only a few viable builds in D3. That is the difference. The amount of work that has gone into each skill in D3 is something that should be applauded. They've tried to make EVERY skill useful; obviously, this wont happen, but I think the attempt should be complimented, not criticised by people who don't even realise how the system works.
You don't think they tried to make every skill useful in Diablo 2? Why do you believe them now and not then?
List of builds that are hell viable in 1.13 (Hell viable means can solo hell, pvp builds not counted):
Sorceress: Blizzard, fireball, meteorb, firewall, about ten other fire/cold hybrids, lightning, enchant and enchant hybrids, nova. Single element builds are merc dependant for immunes.
Amazon: Jabazon (and other permutations of the 2h javazon), javazon, jav/bow hybrid, bowazon. Javazons struggle to solo hell without a mercenary and/or a good weapon.
Necromancer: Skellymancer, zoomancer, fishymancer, poison/fish hybrid, poison/skeleton hybrid, pure poison (poison + golem/CE) and dagger-oriented poison, bone necro. Skellymancers have historically played host to strange builds involving bows and stuff like that.
Assassin: Traps, kick, claw, traps/claw hybrid; kick hybrids may also be possible. Claw struggles to solo without good itemization, pure traps depends on mercenaries for immunes.
Paladin: Zealadin, smiter, vengeance, hammerdin. Zealadins are gear-dependant on hardcore and simply require patience on softcore.
Barbarian: Zerker/WW, throw baba. Throw barbs are heavily gear dependant.
Druid: Werewolf, werebear, elemental; all three can have a varying degree of summons. Melee builds are inherently gear-dependant.
You must have huge hands.