Churchill is indeed really accurate against infantry, and the nade is cheap and really effective! Also Churchill will be up close and personal allot to be able to throw the nade. (though the nade is often buggy and doesnt throw)
but I believe the Comet has better damage / penetatrion / range, against vehicles than churchill.
Comet is really not a bad tank..
Churchill just has more appealing and popular things that come with it, like the heavy engineers. which I personally only use for repairs - I should really try some bren guns on them - but they are sooo slow..
Anyway. I mostly use the Vanguard doctrine. I dont see a point in going churchill and croc both, so I end up using hammer allot. The brits warspeed / blitz mechanic that comes with it allows for some saves on a croc, that you would probably have lost otherwise. (I love the vet.. vet2 movement speed - vet 3 passive engine repairs)
In the end I guess its a question of, do you want a churchill and firefly,
or a croc + firefly or comet. The latter seems better to me, (more flexiable) but im sure there are hundreds who disagree.
USF infantry is dominating without a doubt. More often than not, you can run up to Volk that is standing behind green cover, and still win the engagement fairly easily.
Nerf USF infantry, or buff axis infantry in some way. They are honestly a little too strong at the moment. 1v1, 2v2, Axis is suffering.