Hm.. most of the important stuff was already posted.
In some parts the map is still too dark. There're areas where's just black.
It would be useful when players don't get blocked by these stalactites. Maybe make them "mist".
A few screenshots with holes and edges, you should avoid. Doesn't look good and isn't mapped well. As jitspoe already wrote, clipping planes will help you to create more natual cave walls properly.
It's ok for your second beta map. Try to improve the map that it will be something special
Map is online @ [OTB] Beta!