What is "actual success in World Football"?
352 and 343 have been used by Italian teams with Juve for example and it was working just fine too in their league. Conte won the EPL title with it iirc?
Winning silverware. Your right about Conte and the EPL too.
Football formations go in cycles. We saw how Pep tried to shift from 433 to 343 in the end of his tenur here to try and evolve. But still, 433 persists for him due to the reason mentioned in the bottom sentence.
From initial observation I am wondering if with the right personel the way to disrupt the 433 is with a modernised 352. One that during the match you can positionally change the setup to a 433 in attacking phases- mainly due to having either the RCB or LCB (or both) being able to play CB,RB/LB (both for attacking and defensive phases.
A role very hard to find in football (Ramos, Abidal... Mingueza, Kounde). Yet none of Alba, Roberto, Pique, Lenglet, Ruben Dias, Van Dijk or even Dani Alves could be this).
You then need a midfielder who can go to AML/AMR. Easier to find in the world of hybrid attackers. De Bruyne for City, Pedri for us right now.
Not 343 to 433 being the interchange as previously attempted, as it leaves the wings overly exposed comparatively, while little possessional difference to the 352.