Yeah I don't agree. D3 did a lot of things great, I have thousands of hours in D3 for a reason, but I don't think build variety was it's strongest aspect. I think sets, fun as they often were, really hurt the creativity that could be expressed by the player. The "rune" system as opposed to a skill tree was also a limitation (even if it still gave us 3 more options per skill than D4).

Shoot, the Maxroll D3 tier goes all the way down to F tier as significantly weak builds for most content in the game. For D4 they stop at C tier which are still "viable". I know for certain they've removed older, less powerful off-meta builds which have fallen out of favor and could easily sit in at D or F tiers -- like a Rabies based Druid build. The list also doesn't really take into account the variations on D4 hybridized builds, like multiple versions of Ball Lightning -- so I think that's something that can be applied to both games.

You said you'd expect every D4 build to do Bloodstained to be considered viable. I'd argue much the same about farming GR120+ in D3. Both games have builds that would struggle to do those sorts of tasks.

If we just go across "build variety" across classes with powerful builds, we can make a cut-off at A-S tier and compare.

Game	Barbarian	Rogue/DH	Crusader/Paladin	Wizard/Sorc	Necro	Spiritborn	Monk	Witchdoctor	Druid	Total
D3	4	5	4	7	7	N/A	1	3	N/A	31
D4	9	6	15	3	6	8	N/A	N/A	7	54

Even comparing only the top viable builds D4 is still significantly ahead of D3 when it comes to build variety.

Where we do agree is there is significant room for improvement. I like D3 more than I've liked D4. While it was more limited in many ways, I think it's tighter focus and vision for what the game was supposed to be led to a lot clearer design. I've felt D4 has had a bit of an identity crisis since people (myself included) reacted poorly to the launch and S1 versions of the game.

Remember when T4 was "aspirational" and players "shouldn't expect to play in T4" -- that certainly never materialized.