Tier 10 Medium Tanks and Tank Destroyers

Black_Gold_Saw, on 11 June 2012 - 06:04 PM, said: This is nice but, tier 9 meds and TD's are so affective against tier 10 heavy's.
Wont this upgrade to tier 10 a little overpowerd.
AND can we expect tier 11/12/13 heavy tanks??.