Hopefully this gets some votes! My team and I have noticed that even though we have our ProofHQ notifications set to "Decisions/Final Decision" for our whole team, we still get bombarded with in-app notifications in the top right drop down. Sometimes we're hit with 200+ notifications just from comments (my boss was out of office for vacation, and she was hit with 600+!).
I think it would be hugely beneficial if we were able to toggle the proof notifications in-app as well as email notifications - everything else is already so customizable, this should be too. I think someone else has posted an idea exchange for this, but maybe another one will push it up the list!