It think the useless comes into play when you consider that Assize, Benediction, Tetra etc are all abilities that you can't/shouldn't be planning to burn at set intervals. I'm not usually going to use assize unless there is a large amount of trash, I need mana, or a quick aoe heal. Preferably two of the three. Bene is usually my 'oh god he's going to die' button and I usually use tetra when the tank still needs my attention but maybe a dps just stepped in something so I'll throw it out to keep from losing too much time on the tank. It's all very situational and so yes, sometimes that cooldown reduction might come in handy but other times I'm going to have to burn my lilies early because as much as I might want to wait to use it on Assize when I have three, using benediction to keep the tank alive is more important even if I only have one Lily. The benefit is too spotty and connected to too many situational cooldowns. It would be far better and more consistent if we could at least pick when to use it or it provided a long standing buff to MND etc so long as lilies were active and we had other more impactful moves we could burn them on at a time of our choosing. As it stands, there will be a lot of instances where a good WHM should ignore lilies in favor of using cooldowns when they are needed.