A few weeks ago, I wanted to sell all of our midfielders when we played 433 since they were all crap (except Busi and 50:50 Iniesta).
But now, if we'll play this 343 in the future (and I hope that we will), Rafinha, Rakitic and Roberto are good enough for this formation.
For 343, we will need at least 6 midfielders (for the whole season).
So, we will probably keep Iniesta, Busi, Rakitic, Rafinha, Roberto.
Gomes and Denis will get a 2nd chance.
We will probably sell Arda.
If Denis and Gomes won't improve, we can sell them.
Also, I would still want someone like Verratti for the future.
Plus Alena.
And then these current guys Iniesta-Busi-Rakitic-Rafinha-Roberto.
Also, if we'll play 343, do we even need Bellerin then?
We can still use Roberto in this 343 as a hybrid Rb-Cm-Rm, plus Vidal can easily play as a Rm in this formation.
I wouldn't spend a cash now on a RB, I would rather spend 100M for Verratti and bring Munir back and that's it.