Why the Higher CP and other abilities though? All other heavy tanks come out at 13CP so I don't see no reason why this should be any different. Make it any higher then 13 and you will never see it because the match will always be over before players have the choice to use it (1v1) The KT is already balanced for price and performance against other heavy tanks so changing the abilities or the price will just throw a wrench in the game balance and a good functioning unit.
Because the King is way besser as a normal Tiger, also higher CP can allow some extra abilities to make it different to OKW version like a explosive round (one Brummbär shot on target, funktion as Comet's phosphor shell) etc.