Heroic Jaina Proudmoore
Last week, we killed Heroic Jaina and got the Ahead of the Curve feat for Battle of Daz'alor. The fight took us a fair amount of time overall, as we had a lot of problems with Phase 3.
We ended up switching to having most of the raid get frozen early during Bloodlust, and having a small group break people out. That proved to be the strategy which got us past P3, and Jaina went down shortly after.
I really like the Jaina Proudmoore fight. It feels like fighting a powerful frost mage. It matches the story quite well. There's a solid variety of mechanics, but nothing feels too contrived. Jaina using Iceblock in response to Bloodlust is simply hilarious, an outstanding mechanic. Once you master each portion of the fight, you generally have it down. Wipes never feel arbitrary, but always because you made an identifiable mistake.
Heroic Restless Cabal
After we got Jaina, we still had an hour or two left in the raid, so we went back to Crucible of Storms, this time on Heroic. The first boss took us about an hour. It's basically the same as Normal, only this time you have to do all the mechanics correctly.
If you did the fight properly on Normal, and didn't try to overpower mechanics, Heroic is just more healing and damage required. It's less difficult than Jaina.
After Restless Cabal, we took a look at Heroic Uu'nat. This one looks a lot harder, and it looks like a fun challenge to finish the rest of the tier. I also think that--unlike Cabal--we didn't do half the mechanics properly in Normal, so we'll have to learn to do them correctly.