Scouts take ages to clear mines in the beta.
It goes towards a mine, kills it, then goes back towards its original location (when normally moved to a planet, this would be the outer ring).
This way it takes ages for the scouts to clear mines.
Additionally when having several scouts, they all target the same mine, go towards it, kill it, and go back to their original spot only to repeat targeting a single mine again.
This strikes me as something horribly wrong with scout AI. Please have them chain-target mines and target seperate mines when multiple scouts are around.