The weekly cap is simply for lazy devs that really don't have anything else in game AND to keep subs. There is really no real legit reason for a tome system other than to slow down progression to keep you coming back. But if there was more than one set to aim for it wouldn't really matter. I've also noticed that most people that like the cap are people that are extremely worried about what someone else is doing. If someone can/wants to grind out gear all day. Why does it really matter? It doesn't.