I do like the idea of never getting the same seal again, but that would be a big hit to the RNG factor of the class, so I am not very sure if it would be done.

The idea of swap is to get the equivalent of the same seal, I believe it would help and make it much easier to plan your cards for the duration of the entire fight, especially when you have 90s jobs in your party. I'll edit the post to add this in.