I have not read all of the thread but I have the strong feeling that any new player that uses skip potions or anything like it now would be very disappointed. Right now there aren't any groups that are really going to be doing learning parties for endgame raiding and without any real MSQ to do they will be stuck doing side content or something like Eureka which at this point is also past the point where players are learning and enjoying it. At this stage in an expansion my experience has been that everything that is being done in regards to endgame by players is just trying to grind out any content they haven't finished up. New players may not be able to make it to Shadowbringers on its release but they would make it well before the expansion ends, and maybe even before the first patch that adds more MSQ.