We have been playing 3-4-3 for short time now,let's wait to see how long it is gonna succeed there.
Remember the man in your avatar has tried it 10 years ago too and had initial success but then it didn't continue to be effective
Ok.
But there is always an option to switch between formations.
If 343 will prove to be Godlike against minor teams, but weak against Bayern and Real, we can always play 343 at Camp Nou against 90% of La liga teams and on some away matches and 433, 442 or 451 against better opponents.
But, imo, in any options where we'll play 343 in more than 50% of matches, having already 4 fullbacks (and buying some new) is way too much.
We would really need to play extremely bad to get to levels of 433 which was bad during Tata, first half of 2014/15 under Lucho, 2nd half of 2015/16, first half of 2016/17.
In the last 3,5 half years, 433 was efficient for total of 12 Months and it was getting worse and worse lately.
So, 343 would need to fail real hard to reach the level of pain of 433 lately.
Ok, we'll have to wait and see what will happen with us and 343.
But then, isn't it dumb from sporting directors to seek for a RB since:
1. we don't know whether 343 will end as average or awesome in upcoming Months?
2. we don't know who a new coach will be
3. we don't know which formation will a new coach use
I will be extremely pissed if a new coach will try a new formation.
Just imagine that we win a CL now with 343 and then a new coach starts with a new formation instead of a winning formation.
It will be the same as Bayern with Pep ruining a winning formula.
I am a fan of don't fix what ain't broken, and currently our 343 looks like top 3-4 best formations from the last 20 years (with Cruijff's team, Van Gaal's formation, Rijkaard's 433 from 2004-2006 and Pep's Tiki-Taka).
We didn't look this good since 2011.
So, I would rather give more time and credits to this formation than already looking for some other options, especially those which aren't working for years (433, I am pointing fingers at you).