Let the system concentrate on the city maps more than the countrysides, city maps or more preferable than the others. Some people are suggesting to remove NSA, but I am against that suggestion. NSA has been a part of the game for a long time, there are players who like the map like me and wuzi(example).
So what I want to say is to let the system concentrate on the city maps more than WV and NSA. For example, the system is going on a circle right ? So keep it like this, the system loads SF, LS and LV 2 times and then in between only one time the system picks NSA or WV. It will follow this path:
SF
LS
LV
SF
LS
LV
NSA(or WV)
LS
SF
WV
Lv and ao on..
This is just an example.
OR
Keep it as it is.