can someone explain?

We posted a preview of the Dungeon Journal on the blog shortly before the release of patch 4.2 and you can find it here- http://us.battle.net/wow/en/blog/2943357

If there seems to be missing information, it's because we currently only have the Cataclysm dungeons and raids in the system and plan to add all of the rest of the dungeons and raids at some point in the future.

The purpose of the Dungeon Finder is simply to provide information in-game that is easy and accessible to everyone on the various bosses, their abilities and their loot. It is not there to provide strategies. We just wanted to give a solid starting point and foundation to everyone and let each group determine the best course of action from there.

So theres this new feature, the dungeon journal. Why was it put in? its missing information and doesnt give you any strats, and it seems useful for knowing what loot is on the boss without going to wowhead. why did they spend time adding this?

also is there any way to turn the faces off the big map its actually kinda obstructing my map.

The journal does have items missing from the Firelands Raid.
There is a staff that drops off rag that is not in there.
There are items that drop of any of the bosses in Firelands that is not in there.

And it would be helpful when you are in loot mode, clicking on the item takes you to the boss that drops it, and also being able to change bosses while in loot mode would be helpful too.

Good feedback.

In some cases we've purposefully left out some of the finer details since we don't want it to tell you everything you need to do to beat the encounter. We want it to be just enough information for you to feel empowered enough to give it a shot though.

We're keeping an eye on constructive feedback as always and appreciate those who do provide it.

We are looking at the concerns over the faces blocking the map view in the Dungeon Journal. We're aware of this concern and may provide an option to turn them off at a future point in time. We'll provide information on this though when we are able.

As for the concerns over accuracy, there is always the potential for information to change based on adjustments made to the bosses and the fights. Overall though, the Dungeon Journal should be seen as an accurate representation of the boss fights and abilities. We have seen a lot of misunderstandings or inaccurate information provided via external sources and hope that the Dungeon Journal can better shore up those external sources with its information.

As for some concerns over missing loot, we did purposefully leave out "grab-bag" items. Meaning, items that have the potential for dropping on multiple bosses were not added to the listing of items. We may choose to change this decision at a future point in time if we feel that it's causing additional confusion. For now though, just be aware that these items do not appear in the listed loot tables.