Adding more jobs hardly makes a difference, as long as it doesn't come with a new gear set, and iirc they haven't introduced a new set ever. The only thing you'd need more of is the weapon.
Also, you say if you miss a week, you are lagging behind. While that's is true, if there is no cap, you are lagging behind way more if you can't dedicate dozens of hours every week. I think the weekly cap is the lesser evil.
