You're almost describing the UWL
Many of the UWL rules are incomprehensible to me* but it has some great ideas. Here in NZ woodsball some clubs play something similar to the UWL scoring format only everything is electronic - a bunch of scattered flag stations are wirelessly linked and a central computer counts down the points from each team according to how many bases they hold or don't just like Battlefield1942, and then declares the winner and sounds an alarm when it's over. Among other things.
*the 11th player thing seems entirely pointless - why is he optional and other players aren't? It's just 11 man paintball with weird pointless rules for when you show up with 10, but still calls itself 10 man for no reason. There are a few of these arbitrary rules in the UWL that just don't seem well thought out.