Regarding Sacrifice, Willits mentions that it basically plays like football and spectates like football. He also states that teams have to "get together and push forward". Not much of other detail is revealed, but it certainly gives food for thought. The most football-like mode in Quake titles so far was 1-Flag CTF and perhaps Sacrifice will be much in the same vein, with teams contesting a single objective on the map and trying to capture it.

Source: O-Ton Interview
Even now the sensitivity slider in the menu (limited to 2dp if you click the number), set to 1.15 is "mouseRotateSensitivityCoef": 1.1499999761581421 in the game.cfg... 2dp isn't enough for high DPI mice.