I’ve downloaded World of Tanks Commn Test and took a few screen grabs with what’s new on 9.19. The biggest change is the introduction of Ranked Battles, Improved Equipment and Directives that can be bought with Bonds.
Improved Equipment can be mounted just like any other equipment, they are expensive costing on average 5,000 Bonds and replace the equipment you want to upgrade. On the other hand Directives are just like a normal consumable, you can only have one and will be automatically used after each battle, meaning you have to buy it again just like any normal consumable. Directives can give you bonus to Equipment or Crew Skills/Perks.