So, as soon as the patch notes, I tried to find out how to calculate the probability of winning this mini game, and this is what I deduced.

By fulfilling weekly objectives, you can gain up to 9 seals which are placed randomly on a 4 x 4 grid, as seen in the patch notes screenshots.

There appear to be this many pattern possible :
16!/[9! * (16 - 9)!] = 11440

I was able to identify 24 winning pattern.


11440 / 24 = 476

So, after going through the hassle of doing those 9 objectives, you have one chance out of 476 to win the best rewards ?

That's a lot of time for such a little chance.

Feel free to correct me if the calculation is wrong but so far, it seems a really disappointing addition.