Rob Boss Mods was brought to my attention during a quick PUG run of Zul'Aman that I wanted to get out of the way on then-main, now-alt paladin. I've had notoriously bad luck with items dropping in ZA for my paladin, but with the new changes, healing the place has not been too bad. However, there are still players out there who have not fully completed runs of the place, and I've seen tanks, healers, and even DPSers drop group when someone expresses the simple notion that they might not have been to this particular dungeon before.
Enter RobBossMods. Think of this addon as reporting Recount to your group, except with boss strategies. Hopefully, the proliferation of addons such as RobBossMods will rip the stigma away from being new to instances and facilitate easier grouping. In my opinion, anything that makes players feel more comfortable in the content is a good thing.