I guess my contention is that your friend has paid for this content. Stating that the quests and story is 'wasting their time and in the way of playing the content they paid for' is disingenuous. Thats content you paid for. You may think its a slog (and there is a lot of it) but its still part of the game. Ask yourself what you and your friend are aiming to do? If they want to play the story and MSQ, then thats part of it and it seems counter productive to be upset about it. It's like if youre reading a book and decide to skip some chapters cause "Oh its boring." At that point, why not skip to the end and just know how it finishes, and if youre going to do that, why bother reading the book at all.

If the MSQ isnt a draw and end game dungeons is, then just speed through it or use a skip potion. I get the MSQ is long, but seriously, I think people are making it out to be worse than it is. Smash that mouse click or gamepad and just zip through all the texts, skip every cutscene, and its really not as long as people give it, especially if you can have someone unsync and run you through dungeons.

TLDR: Either skip cut-scenes and dialogue if the jump potion is to expensive, or actually play the content they paid for and just enjoy it for what it is. Which ever is more important, just do that and run with it.