Just give it a speed advantage to match KT's. Seriously.
I would much much rather "lose" the historical authenticity of the moving speed of a tank than insert a whole new paper machine in the game.
Between having a "paper tank" and a souped up Churchill with nitro, overcharged engine and a spoiler at the back, I'd take the "paper tank". If I wanted to have WW2 represented to the tee, I'd play Gates of Hell: Ostfront.
I mean we're already playing a game where the Pak 43 doesn't fucking explode Shermans in one shot. A game where a squad of 5 highly trained rangers miss more than 50 percent of their shots on a squad running past them because they decided to run home instead of staying on the battlefield. A game where home bases are built barely 500 meters away from each other. A game where Panthers never have transmission issues (or any of the other tanks for that matter). A game where someone can survive being shot with a 50 cal. A game where infantry engagements end at 35 meters...
The game takes liberties for the sake of being fun is all I'm saying. I still would rather they quit building games around le medium and hoovy tanks.