You can edit it. (ASK it first if you want) You can share it (ASK it firts if you want) You can use it on your server. Dont change the map name. Dont say it yours.
For t-s it is easier to defend the flag, cause you spawn, and shoot in the direction of the flag, no one will survive that, but at the ct base, you can't do that, so fix it. Move tha t flag above a wall, ore something to defend the attackers, ore move the ct flag in line with the ct base.