Hello So I cleared the LFR for the thrid time at midnight (ye that's how cool I am ) anyway jokes aside
The nerf I believe have happen is at the last boss on LFR, who only have 2 set of spikes going clockwise around him and not 4 anymore.
Might have been a bugg but I don't think so.
PS: I believe that LFR is a succes however nerfing something that's already is easy (saying easy from looking at how people is handling the encounters).