This new update brings some reworked and improved balancing for the game, especially for SPGs, Artillery. In the patch, there are also going new tanks and a new map.
New Map: Sacred Valley
This is an Asian inspired map with a lot of variety in terrain shape with hills, open areas narrow passages and much more!
New Tier V Tank: British Heavy Tank, Excelsior
The Excelsior is a new premium British tank that is a nice all-rounded tank with some good frontal and turret armor. It have a nice rate of fire and a good aiming time.
Then there is a bunch of new SPGs
SU-122A – Tier V
SU-14-1 – Tier VII
G.Pz. Mk. VI (e) – Tier II
Pz.Sfl. IVb – Tier IV
G.W. Tiger (P) – Tier VIII
M44 – Tier VI
M53/M55 – Tier IX
AMX 105 AM mle. 47 – Tier IV
Bat-Châtillon 155 55 – Tier IX
Some other changes are that Tier X tanks have their credit income increase, except for SPGs. The credit income have also increased for Tier IX, VIII, VII and VI, but again, not for the SPGs.
And much more! Read more information about World of Tanks Patch 8.6 HERE