We had a very cool raid tonight, all of ICC 10 man cleared in about 3h 50m! When the Blood-Queen fell we were at 9/15 Unsuccessful Attempts until Retreat.
I really enjoyed the two new fights in this section. The Princes are a bit messy at first but easy once you see what's going on around you and learn what to look out for.
The Orb Whisperer
The Crimson Hall
Lana'thel is a fight with connected people like Mother Shahraz only you run towards each other. This is easily handled by standing sort of like a circle and all those affected just run to the middle and meet there. The 2 tanks share damage so you need to keep them up, the raid takes constant ticking damage as well so keep the heals flowing on all. Then there are flames (purple thing in the picture) like the Lord Jaraxxus fight so if you get it just run outwards to the wall. Stay spread out and keep everyone up, that's what you need to do as a healer.