I had explained the fights in detail before each boss. We wiped maybe once or twice on each boss. The group of players I had were keen on listening. I understand this is probably a once in a lifetime event.
I generally stay away from LFR. The second wing I ran, was the first time I've ran LFR in 2 months.
I honestly think the level of difficulty should remain the same. It might even push some of the LFR people to learn proper rotation and mechanics of a raid.