The other changes to Breach were in the notes, but one of the most important was not added:
Inability to select duplicate heroes on the same team.
It doesn't need to apply to the rest of the game, but teams capable of exploiting the overlap of four of the same character - even two of them - in Breach is an unnecessary frustration. Having two Centurion, Shaman, Jormungandr, Shugoki, and so on, should not be possible.
Being stuck in Breach with such a team usually meant they weren't interested in objectives beyond tunnelling down revives.
MAYBE this will be solved if lives aren't a concern, but it's HIGHLY doubtful.
The game has enough heroes now that such a rule won't interfere with player choices. It would be even better to be able to choose a hero BEFORE matching, if this were implemented.
It would positively impact the objective-based, long-term game mode that Breach seems to be aiming for, and it would force a more diverse cast within a team which would better enable each team to engage with said objectives.
A much-missed change I was shocked to see left out.