Finish it - even if you dont like it. If you make thousands of maps which are not finished (like me

), you had hours and days of work but you couldnt even release one of them.
You should only convert small brushs to detail, no structure. Texture only visible faces with gras etc., texture the invisible faces with common/nodraw.
Reduce the resolution of patches if they are too complex and trie to use less bushes and trees. Reducing the farplane might also help.
If your map is getting big, use vis_leafgroups. If the vis compile takes ages, it takes ages. Only if your map runs fast it makes sense to play it with others over the internet, so take the time, just let your computer compile it over the night.
...waking up in the middle of the night with your hands covered in blood and you have no idea what happened.