A lot of things are needed to fix this map though.
1 - Most important thing, fix the leak. That means repairing the sky as well as a few sections of floor.
2 - Realign textures and correct the colors in the right places.
3 - Fix the horrible sightlines so VISing doesn't cause your computer to blow up.
4 - Detail anything that can be laid a hand on.
5 - Edit the gameplay. As of now, without editting any of the map layout, the middle path right in front of the flag will be heavily used.
Those are just a few necessary things that will be needed to even make this map playable. Hope this helps those newer mappers that want to have a shot at fixing this map.