Also why'd they finally move steam notifications to the top right then move something REALLY important there?
But if it really is super important you can also set yourself to offline or actually be offline in steam, then you will get very few messages and love the score in all its glory.
What if you're using steam chat?
Then you'll have to live with it...
Firstly the steam overlay announcements were moved before the UI update and goes through a different process to get moved.
Secondly I prefer it to cover the score when anyone logs in or out, I've always found bottom right if screen annoying on any game..
Thirdly I have over 200 steam friends, my screen can get pretty active, and I never find it an issue to miss the score board a while.