Well... the idea is good.
There's only one possible problem, that is: the score being 4. There are 5 possible outcomes of such: 4-0, 3-1, 2-2, 1-3 and 4-0, to which I'd say that joining 4-0 match ain't worth it (which makes such indication worthless in 40% of cases). Some may argue about 3-1 and 1-3 matches too. ^^
I see the point of showing total score - to nullify picking winning sides for achieve grinding - but at the same time it partially nullifies the usefullness of such indication.
(Also, I witnessed few matches that lasted shorter than Slayer's Angel Of Death form start to finish, so... yeah)