They never had mission icons in the first game, so not likely to have them in this game either. It's considered too much "hand holding" for a hard-core RPG.
The dialog and journal entries should contain place names and/or names of people, you just have to go looking.
A number of combat things are going to change on release, but the fundamental mechanics are going to stay the same obviously. (Notable changes, from memory: slightly less surface spread so everything doesn't instantly turn into an explosive or toxic wasteland, some new skills, stunned and frozen can only be applied if shocked or chilled to begin with, and a whole bunch of balance improvements.)