Personally, I think our recent success came about despite our lack of real full backs, not because.
Pep has repeatedly said he values squad harmony, & the best way to achieve that is through players getting enough game time. Our lack of FB's has seemed more of mend & make do with an elite squad of versatile players.
My hope is that we don't try & turn Khusanov & Gvardiol into permanent FB's, ahead of actually grooming or signing specialist overlapping FB's.
At times against Paris, I had no idea where half the team were supposed to be positioned, & it looked like the team didn't know either, hence PSG ripping us to shreds, & making us looking like a team from the walking football league.