Douze is popular because it's an open map.

[#M|A#Wolf]

if someone's right in your face at 70 fov on a tighter official map, good luck because they could quite easily leave your view.

Precisely my point. If you have any intentions on playing at an average level you need to bring up your fov, maybe you're right that movement feels more responsive, I haven't played with low fovs enough time to know that, but what's the point of that if you have less view + because of that lack of view you lack the ability to move around cunningly in a encounter against someone. Just imagine the advantages of someone with fov 120 against you, they can see you while you don't.