Interesting episode, especially the topic that Nami was talking about in that episode
Again a big change to the overall story of the series
A question I thought of though during the episode. Once Roger made it to the end of the grandline, how would he get back to the beginning? Would he backtrack, or is there some sort of other secret entrance to the end of the grandline?
Maybe it will turn out that Raftel is the backend of reverse mountain so all Crocus did was hike around to the other side (Where he met luffy)