I happen to agree with Veronis. While I like the idea of having this available, I can understand the concerns of the cutting/bleeding edge raiders who would prefer to not use this but cannot afford to do so as they might lose their top 5/10/50/100 spot to someone else who does use it and saves an hour or two a week.
I could see where Blizzard might could have compromised and restricted the tool such that abilities, even if the heroic-only ones, weren't displayed until they had been seen or the boss had been killed on that realm. But even that would still give an unfair advantage to whoever the #2 guilds on Ensidia/Paragon/etc's servers are.
Almost what they need is an achievement that would show that no one in the raid had looked at the boss' journey entry prior to the kill for measuring the best-of-the-best for world first - though you could have someone accidentally ruin it for a guild if someone in a competing guild linked them an ability out of the journey and they didn't realize it.

Now, if the guys who are complaining are the #s 5-10 guilds or the standard "anything that isn't 6 weeks of wiping on a new boss for 5 hours a night 4 nights a week isn't hardcore enough for me", they can go STFU and DIAF.