You don`t because our midfielders already don`t create anything, especially that weird RCM position. In 3412 we could have a solid defense, with alba and roberto protecting the flanks and helping to create something in the attack and finally letting the two central midfielders to be just that, not some hybrid shit.
I don`t know, maybe it would be a disaster. All I know is that current setup is not working and is hurting my brain every time I watch Barca.
Alba and Roberto creating something?
Roberto created 2 actions as a fullback in the last 30 matches.
Alba is not much better either in attack.
But that's just my opinion about a formation with only 2 pure midfielders. I think that we would be even worse than in 433.
About the part where you say that your brain is hurting, are you talking about this whole season (both 433 and 343) or only about 433/343?
Since 343 has problems in defense, but we scored 2 goals against Atletico, 6 against Gijon, 5 against Celta, 5 against Psg and 4 against Valencia.
Against Deportivo we were bad, but that was 3-4 days after an epic win (we were mentally exhausted) plus Lucho played Denis, Gomes and Arda.
For me, for now, 343 is not the same as 433.
In 433, our midfield was horrible, attack was hot and cold (5 goals in one match, and 0-1 in the next match), while defense was fragile also (Roberto).
In 343, defense is surely fragile, but midfield is way better and attack is also better (due to a better midfield).
I don't know whether 433 is the answer for the future, but 433 worked the best mostly when we had prime Xavi and Iniesta.
Those prime guys are not here anymore. We have Rakitic, Gomes, Denis, Rafinha, Roberto who aren't even close in attack, defense, movement, build up, anything.
So, a future 433 (imo) could be only a poor man's version of our winning 433.
When you add that we'll never again have someone like Alves.
Plus that Messi from 2006, 2009 or 2011 is not the same guy in terms of running, that means that a current 433 is weaker by far in at least 4 positions than our prime 433.
Not to mention that opponents figured out over years how to neutralize our 433.
So, I don't know what will happen with 343, but I don't have too much faith anymore in 433.
So, imo, we will either stick with 343 or try new formations like 442, 451 and similar in the future.