Jp4 is great because it's guaranteed to pen 95% of stock allied armour and has a great rof. There are exactly 2 stock vehicles that the Jp4 can't pen every shot, and both of those are on 1 faction and each are exclusive with the other. Meanwhile, match that up against the axis and there are as many vehicles it would be OK against as it would struggle against. If you are too stupid to realize that "huuuurrr de durr just swap them then!!!" is an absolute retarded thing to say due to asymmetric balance which is extremely prominent in the armour design of factions in surprised you can navigate a forum in the first place.
How many stock axis vehicles will the Jackson struggle to pen? How many will the SU 85, or the Firefly? And why are we talking about stock vehicles? How often do games get finished without picking a single doctrine? It almost seems like you're purposely diving into semantics in order to
The prominent armour design of the factions is that "If two vehicles cost exactly the same, the allied one is considerably better"
Consider this:
A Tiger and 2 Paks facing an IS 2 and 2 Zis. IS 2 hardcounters both Tiger as well as PaKs. Zis guns hardcounter both Tiger as well as PaKs.
The JP4, a tank destroyer enters the field. And gets countered by the very thing it's supposed to counter. The Panther, a 185 premium tank destroyer enters the field. And gets countered by the very thing it's supposed to counter.
Not to mention that no IS 2 is needed to counter all of those expensive vehicles. A simple T-34 ram+strafe combo is A-OK to counter even the most expensive units in the entire game - at no micro cost and 0 chance of counterplay!
The old adage that was introduced in 2013 of "Doctrinal counters to doctrinal vehicles" only applies to axis. The allies can simply call in a stock unit and counter whatever axis unit they encounter, and usually at a cost advantage that is simply stupefying.
I also find it funny that a (barely) breathing reminder of the necessity of eugenics like you would dare shittalk others ...
But that's none of my business