Just keep working on it.
If you feel something could be better, then try your best to make it better.
Once in a great while, people release their .bsp along with the .rmf file, (I've aquired a few custom TFC maps that way) but I haven't seen anyone do that with ESF as of yet.
i could do that if any1 would want me to on demand. however i don't think the file would be reasonably sized but then i'm 56ker. mayb just ship the .map or .rmx instead
bak on topic, just read the help section of hammer and check out site called rust: http://www.gamedesign.net/?file=rust/content&category=half-life
thats a good help as well. and don't ferget through rust to check out handy vandals almanac.
anything else.... yeah read the stickies, read the stickies, read the stickies. i say three times coz ppl DON'T read the stickies.