First of all which mode are you playing? If 1v1 then you're probably right and you can dismiss what I'm saying, if not then most of what you're saying is complete rubbish I'm sorry
What paths need is price increase. They are dirty cheap, they should at least cost around 230-240, considering how they can just overwhelm you in early game and 2 of them can fight pretty much any set-up early into the game by sheer numbers.
Pathfinders are literally the 3-man Scout squad with one extra soldier, the utility package and a rifle-nade. They lose hard vs charging DAK Pgrens and they are also pretty much defenseless vs Grenadiers + Sniper support. Yeah they give you a lot of map control in the first 5min but then they fall apart like wet paper, unless you're fighting vs a clueless opponent who just builds 2 MGs + grens and hopes for the best
By the time you can field light vehicle, unless enemy gave up fighting completely, you already can have zook paras. And because you skip T1, you can just go for quad-mount or howi M5, via mech support (which is meta).
What LV are we talking about here? The Flakvierling is on par with the quad flak and zook paras can be easily avoided by a mobile suppression platform if you give it some sight. As Wehr it's a bit harder but you could just cope with 1-2 schreck jaegers until tanks arrive. And if he builds the 57mm HT and you don't build a LV, then he just wasted resources for nothing.
*76mm sherman is also just insane. Its probably should be more AT orientated tank, possibly even separately build, ones unlocked. Or be a free upgrade for shermans.
The 76mm sherman is the one single thing that US got going for them that could be called overpowered, but it's very expensive hence arriving at a very late stage of the game and it forces you to go 1 specific support center.
*UK tommies at very least, need a price increase from 260 to around 270-280 MP, since they are by far the best infantry in the game.
DAK Pgrens with CA beat tommies under pretty much all circumstances
*DAK is all over the place right now. Basically whole faction is on life support by Italian combined arms battle group.
While Italian CA is arguably the best DAK doctrine at the moment, saying that the faction is "on life support" without it is complete BS. Pgrens with CA have the best stats across all mainline inf squads (and in 2v2-4v4 it's certainly not hard to park a 250 or flakvierling near your grens), they have a non-doctrinal nuke heavy mortar, a dirt-cheap 90 meters scout vehicle and most importantly: The ridiculously strong Armory upgrades that turn your tanks into the best of the game