I think the major benefit of 343 is it allows a basic structure without needing to be asymmetrical. However, the way we're playing it is asymmetrical and we're losing some of the benefits.
We're playing inverted wing backs. That might be OK on one flank (even then I think it's questionable). But on two flanks, we just don't have the width. Dalot in particular is getting in good positions high up the pitch but then just needing to cut inside, and it's all very cramped. Diallo/Antony can at least take on their full back 1 v 1, but I still think it closes space. Whereas a left footer on the left, and right footer on the right, would create space for the two #10s.
Yesterday we also had Mainoo pushing very high, getting into the half spaces and in behind on occasion. But he was getting to spaces that Bruno and Diallo were operating. Which could lead to some great short interchanges, however with the WBs also being inverted, it was extremely cramped for space and fairly easy for Wolves to defend against - if we didn't run into ourselves first. Even Maz on the right was inverting a lot, stepping into CM both in build up at times, and in the final third. I'd prefer Mainoo, or whoever is #8, to stay deeper and more central, switch play, or play into the attackers feet, and join attacks late.