I was just in a great game and wanted to chat with the other team briefly about it (strategies, etc.) but as it is now the scoreboard covers up most of chat and you can't tell when people leave. So I was talking to one guy (which was hard since I could only read the last line typed 'cause of score screen) and I didn't know when they left so it's possible the end of my conversation was one-sided.
It would be nice if a few things were different:
1) Score screen didn't overlap chat.
2) You could make the score screen go away.
2.5) You could make the score screen come back (if you wanted to reference it while chatting.
3) You could tell when people left the game after the score screen.
4) The chat would tell you (red text or something) when you were talking to yourself.