It doesn't have much armor, but HP, you don't need high penetration, but rate of fire against it.
Funny how in WWII Churchill mk. VII had even more armor than the Tiger (reports of it having bounced some 80 PaK shots), but in this game it has medium-level armor.
I'm not saying Churchill should get a significant armor increase, but at least relic should normalize armor and health a bit (thus reducing vet feed). And make its main gun the same stats as the Cromwell's, so that it won't still be overshadowed by the Comet even after its supposed recent "buff" this patch.