I think the reason why msq doesn't take you straight from 50-60 is because they intentionally designed that way due to multiple lvling venues.
Whether you want to debate if they're wrong or right for doing so is not the point, as its speculation. Thing is currently, people can reach 50 and 60 just by doing a little bit of everything. I don't know if your friend feels like msq should be the only avenue to cap for a first time class but there's just way too much exp routes to take in the game to say there's difficulty capping. If anything, that's the problem right now: too many people capping too fast and not being able to participate further into the story and what it unlocks because they have to play msq catch up.
But really though, your friend should be doing his roulettes before feeling like its hard to cap. At the very least, lvling roulette should be a staple in his exp hunting.
