Ive found a few things about large maps.. They can be created with enough cover as to not get sniped easily. I like to snipe. Plain and simple. However, I also like to play mid and close quarters combat. But, alot of time i hear people complaining that "they get sniped to easily." However, at the same time i see the same players rushing off at the spawn trying to race for the objective. Or, if thats not the case, i see them walking across open areas when there is blatently cover avalible to them.
I admit, ive done the same myself. The more impatient you are, the more likely you are to get sniped. Are there maps with spaces to large where snipers can kill you too easily?? Yes. But alot of maps, like birkby are great for this type of thing. I for one love that map.
That being said, i also agree with the proper time limit idea. Therefore taking out the sniper standoffs. Another idea i like to follow is this. Dont head traight for the objective. I see this alot and this is where people are most likely to be aimed for on a PUB. I try to head for places that the defenders would be and take them out first... It works alot.
Anyways this is just my 2 cents