They shouln't never balance anything with players playing bad, clemency it's already bad at it is and no other tanks should waste skill slots like that, if PLD are ok with having such tool then good for them but the rest of the tanks should be stay away from this specialy since the only scenario where clemency can "shine" can be easily avoided and solved by getting better, there is no need to modify theyr kits to allow mediocrity and a wipe or a thousan of then are necesary to players learn they are doing it wrong.