Agreed, I like on some maps that there's fog (on some of the smaller maps, or maps everyone knows and always has the same 2 chokepoints at the end of a street), it can really change the map and make it feel like a totally different map.
But fog on open plains or steppes is just the worst.
Would be good if we had 5 or so decent terrain plains/steppes maps for battle and just used those in the rotation (along with no fog stipulation on these maps). I haven't seen the admins change the map the last few times I've played on the open maps, but when they do it really irritates me. We put up with so many enclosed maps (and usually all in a row) and they can't play one map where they need to rely more on teammates and terrain than a building and rambo playstyle and they lose their shit.