It is different, yes, but it is not 'broken'. If you want to go early warmonger and start conquering and completely annihilating other civs, you'd best be strong enough and economically prepared enough to withstand the hate and DoWs that will very quickly bring on you- even from would-be friends. Otherwise, wait and build and prepare until you are strong enough to survive it. Either that, or figure out a way to get those friends to go to war with you against the common target, before you pull the trigger.
Well, on Deity it's not actually possible to be "strong enough" by t60 to withstand the hate and DoWs that warmongering will bring on you. So on Deity, early warmongering is in my opinion nerfed. Moriarte managed to pull off an attack run starting with X-Bows, which is impressive, but that's still Medieval tech, and by then your economy and friendships are stronger, plus some other wars may or may not have started brewing, or you have enough gpt to sponsor wars.
I'm still surprised he managed to take cities that early without getting hated on, but I've been trying to start my attack run with ancient and classical units. On Deity, as many have pointed out, the fact that AIs start out with such a stronger military, may be part of the reason you get DoW'd... you're considered weak.
If you have to wait until you're strong enough, it still means early war is nerfed on Deity. Prior to this patch, I would not get chain-DoW'd for taking a few cities early.
So, my strategy used to be: take a few cities with CBs, recharge until Xbows, take a few more, recharge until artillery, take the rest. (unless there's a runaway on the other side of the map)
Why? Because I like playing civs with early unique units. It's fun.
Now, my strategy is: Beeline education like everyone else. *yawn*
I'm curious to hear more details on Moriarte's successful attack run, did he beeline Machinery after NC? Or attack with XBows after Education? That would seem like a t130 or later attack... a trade-route based beeline can get you to Machinery closer to t110, I would think, so I'm guessing that's the case. My most successful attempt at early warfare so far was a machinery beeline with Elizabeth, starting my attack run on t60, but in my haste to wipe all opposition off the continent before Caravels, (which I did) I destroyed my economy and happiness... spent like 20 turns fighting off rebels with 0 science.
On the positive side, when I did meet the other continent, there was zero warmonger hate. ;-)
Either way, if waiting until t130 is how early warmongering has to go now on Deity, fine, it's just a shame. But poor Assyria and Attila really get the shaft if that's the case.
And this is all moot on Immortal or below. I think someone like Montezuma or Shaka can basically hold his own against the entire world even if he starts conquest as early as t60 on Emperor or below, and maybe even on Immortal. So, the diplomacy issue becomes moot. ;-)
I agree with all the people who are saying "But Deity SHOULD be hard"... and well, I'm not disagreeing with you. But peaceful science victory on Deity has been EASY since BNW, and the patch only made early warmongering harder... this is my complaint. Why make it so that there's only one valid strategy on Deity?
I understand that Firaxis doesn't balance the game for Deity, but I'm hoping that if enough people comment on this, they'll notice and do something about it. If not, well, I need to get a better internet connection so I can play MP. ;-)