This is an old thread but I am replying to it because this idea occurred to me recently and several people I know agreed with me that it would be a good idea.

People point out that doing expert roulettes don't take up that much time, but even bearing this in mind I know a lot of people who don't always hit the cap for various reasons - forgetting, just not enjoying running the same dungeons repeatedly, going on holiday, unusually busy work times, being a new or returning player, etc. Plus some people who have limited time to play don't really want to spend 100% of their available time on one type of content.

I understand the argument that it's relatively easy to cap, but aside from this I don't see a good reason why allowing people to catch up if they missed a week shouldn't happen. It doesn't negatively impact anyone else in any way and doesn't seem like a function that would be particularly difficult to implement, so I hope that the devs will consider this for the sake of people who do miss out.