It is one reason high stats players play low tiers in platoons: It doesn't try to weigh the tank tiers in both teams. In doing so, several requirements must be met: While the Garage doesn't display Battle Tiers, you can see the maximum vehicle tier a vehicle will meet in battle. The vehicle rebalances are the first issue Wargaming addressed. Another mismatchmaking I have come across more than once is teams with two Gravediggers vs teams with zero Gravediggers. Improve the experience for preferential tanks while keeping the preferential matchmaking parameter and their unique characteristics intact.
Team balancing within a battle tier takes place according to vehicle specific weighting and additional restrictions.
For example it is IS - russian heavy with tier 7. Penetration for an APCR shell. Wargaming is absolutely ruining this game for people! This means that tier 1 and 2 vehicles see the Matchmaking Chart above for exceptions will never see a desert map. The range of each tier gradually increases with technology and tiers can overlap.