Where has the score box gone? I'd bet it was there before few hours in flags tab.
Also, the arrow wasn't there as far as I remember, yes, I can click it to see more details (score), but that's not as simple as it was
It is now available in the expanded view, along with the ability to vote, comment, edit, etc. In most cases, you don't need to see the score to know that it is a bad post, of course.