Hmm could the coastal map have enemies like these : Worms... like on the bink video we saw the first time ever of HL2.... sweet... Though the model looks like crap in HL2... lol here look :
Its probably been mentioned before but hopefully they finally fix the bug (sorry I mean feature) which you can see when you are inside the church. Just as you are about to look away from certain things they simply disapear which is very distracting I think (i.e. in the video all the grass just disapears half way through the shot)