Well, I still like the Crusader, although I know it was more on the side of a light to medium tank. I’m not as familiar with the Cromwell, though I do know it was more comparible with the Sherman and other medium tanks.
The Churchill was heavy in terms of armor and size, but I thought the gun was somewhat underpowered. Now that I think about it, not really sure what caliber gun the Churchill had.
Perhaps HBG could make the Crusader in his British supplement set as a light tank, like his M-3 Stuart in the US set (those look great by the way).