Yes, I am seriously going to compare their AI performance, on the basis that at conscripts have 0 AI. Thr upgrade even makes them lose access to the molotov upgrade. Just send any vet0 squad against them and sweep them off the field.
I am pretty sure that even the sniper can beat them in a a melee fight.
So according to that reasoning AT support paratroopers are Broken (the ability is actually OP) (or even AT Penals since they retain 66%). A 6 man squad that gets mines to snare, cloak/first strike bonus, great AT while remaining one of the strongest AI infantry (compared to other AT infantry).
Not to mention that paratroopers can pick a super-bazooka and still upgrade with an LMG making the best AI/AT infantry.
If the AI of an AT squad really mattered storm-troopers would be great, but as you pointed out, none uses them.
Conscripts can be spammed and flank hmg and on top of that can be upgraded to Tank hunter only in late game where they can excel at taking out any axis Heavy tank either buy chasing down or by ambushing it.
All that while being cheaper and having lower POP cost.
The effectiveness can be seen here:
https://www.youtube.com/watch?v=bsRAYkVaA_Q&feature=youtu.be
From a design point of view Axis used to have better AT infantry while having worse AI in their tanks. Now they no longer have better AT infantry while their tanks still have worse AI.
Once more, any criticism originating from me, aim solemnly to Relic and Relic alone, which seem to be more interested in sifting the meta (commanders) than actually balancing the game.