@Jay_Herk There was a “Revised Orders” sheet that came with this version, which answered questions regarding the changes. The answers provided there for your questions are:
Many players had observed that tanks seemed a worse buy than infantry. An attack with six tanks against ten infantry was skewed toward the infantry. Even if you won, your tanks were sitting ducks for a counterattack. Now six tanks are about equal in value to ten infantry. The pieces are bolder in color because we wanted people to be able to tell who’s who from across the room.I hope this helps.