to answer your questions:
Picture 1: The shield shows when a unit is in vehicle cover.
picture 2: it seems like the tooltip has gone missing for the ability. The ability itself can be used to reveal snipers in the targeted area.
picture 3: go to graphic options, there is a bar named "model details" - put it to the maximum, then the weapons should stay visible. I'll test it myself.
The issues will be fixed shortly with a hotfix.