What I'd propose is that this Raid Journal Information works in a different way if it is going to stay. Something along the lines of the information gets released slowly (perhaps monitored by Blizzard and when x amount of guilds kill the boss the information becomes viewable on Raid Journal as of the next raiding week (At server maintenance/restart the servers are updated to reflect new Raid Journal view-ability).
Another option could be that the Raid Journal works differently in that once the ability has happened to the raid, the Raid Journal makes the information on that spell viewable (by basically providing tooltip information). This way the information isn't publicly available before going into the encounter and all it does is creates ease for the players to not have to go through logs finding spell id's and reading tooltips through other means). And this provides an ease of use for that guild since the information they have discovered is all noted down automatically and as they progress phase by phase as abilities happen they can work out how to kill the boss. (Example if this was on Sinestra and players got up to Sinestra and the whole raid wipes to Extinction, the Raid Journal would have two abilities added in, one being Extinction which shows how much damage it deals. And if anyone was affected by the damage reduction of being inside the bubble ability in the Raid Journal which says that the ability reduces damage by x. Then it is up to the players to figure out who got the buff/debuff and what they were doing to get that buff/debuff to avoid the Extinction damage rather than straight up saying "Calen casts a Bubble shielding players from damage"). This is just an example of providing the information to the raiders while not giving too much away.
This would also make it easier on a guild to guild basis as during progression most guilds won't want to share too much information but it helps guilds individually without giving away everything to everyone.
One more option is that can even be decided that at a certain point in time all information becomes "unlocked" and have a "timer" on each phase for example till that information is 100% viewable by everyone in the game (probably 3-4 weeks from first kill the entire boss mechanics could be viewable by everyone).
In my eyese Dungeon Journal will ruin the fun in progression if it is implemented how it currently stands
Also check out the EU thread:http://eu.battle.net/wow/en/forum/topic/2098162148?page=1