Actually you're wrong, you need to look at stuff like DPS and TTK rather than just one factor like penetration on JP. In case of JP it has much faster RoF that boosts it's DPS that it outperforms core FF DPS in certain match ups.
JP kills Pershing faster than FF kills Tiger. So it performs fine vs heavies and also beats Jackson and FF in a duel. You can't even argue this point because It's proved by DPS and TTK stats.
Coincidently you speak the importance of RoF when FF has the slowest and a vetted JP4 is one of the fastest.
Cherrypick?
Pen is RNG. All allied players had a valid point that a high armor KT was too RNG dependent, therefore the pen values of the TD went up and KT armor went down. Why is this argument only worth using for allied towards axis but not otherwise? I am noy saying axis is UP but if i claim that JP4 pen is bad, then lets answer the statement instead of playing stats deviation. Also KT has pretty low RoF but no, we focused of JP4.
Yes croc is doctrinal, but being doctrinal is not an advantage. you want to bring doctrines and tulips into this then JP and KT combo get HEAT and arty commander than wipe the floor with any other tank composition for the same popcap.
The fact that croc is docrinal says that its only a posibility from a variety of cases available.
The standard church is pretty durable, slow but sturdy AF, therefore KT would take AGES to bring down a churchill (even though we all know that churchill has no chance vs a KT).
And before you mention "But Elite armor HEAT rounds and..." that is another doctrinal (non meta) possibility, therefore balance should not weight it as much as it does to stock units/stats.
For these reasons KT is not getting a buff, face it. You want a uber buffed KT then elite armor already exists to fill your deepest and darkest wehraboo dreams. Go use it.
You can say that to yourself a thousand times if that makes you happy. Real facts differ a lot from that perspective. I am not being disrespectul to anyone by their thinking, my argument is strong enough and i have reality backing me up