There is an interesting change / ruling on the UDE forums. Basically, static powers continue to trigger from the graveyard. So irana can untap an ability, bellow can still be used, ogres still can't be ticked up, etc. It makes for more consistency in team tactics.
Thats a pretty crazy ruling, but also awesome. That allows me to play only 1 Warrior Ogre in my army and be safe. That is kinda nuts with Irana tho, as well as other triggers.
Yeah -- The ogre thing isn't actually a change from the comprehensive rules, just something we didn't know... It works because it's a non-triggered ongoing ability (as is tyrande and red murloc). Irana (and Ji'lan) have triggered abilities(tick 5/10), so those are changed to work now even if they are off the field. Those are really the only 2 that the change will affect because most abilities deal with attacks, defense or adjacency, none of which happen when a fig is in the graveyard.
It will probably affect pieces in future sets, so keep an eye peeled as stuff starts coming out.