No they aren't, you have 0 elemental damage in D3, a WHOLE category of damage removed, how can any affix or elite can then be more hard than D2? Things like Mortar? Really? THAT'S HARDER than FROST TOUCH? or SHOCKING?
OK, first of all, stop "yelling".
You can't be serious. Frost Touch, Shocking and so on just killed you flat out if you didn't have the resists (gear). There was no skill involved in losing, or winning against them (compare to, say, Lighting Enchanted where maneuvering could actually make a difference, at least as a ranged class). Just like any elite in D3 can be face-tanked if you have the gear.
But the sum total of affixes for a given elite in D3 is harder to deal with, (assuming you don't have the gear to just face tank it, as mentioned). You have to move around more, you have to react more, you have to use combinations of skills more; and you didn't have to deal with CC or disruption (Vortex, Knockback, Waller, etc.) back in D2. Immunities in D2 were annoying, but most of the time you could very easily skip those packs if you couldn't break their immunity (which really wasn't that hard). Packs in D3 are much more difficult to escape once you aggro them; they are much more tenacious (and generally faster moving) than in D2.
So, yes, I maintain that the game-play in D3 is much more involved.