No need as Pep is now playing a 2-2-2-4 formation.
Absolutely this. People are obsessed with old-fashioned formations, when the huge majority of our home matches we're set up in a 3-2-5, a 2-2-2-4, a 3-1-6 or something like that. Even when Nunes was nominally playing right-back, most of the time it was more of a right wing-back or even right midfield position.
There are games we could do with a better more traditional right-back, but those games are few across the season. It can matter because those games are tough, but I can understand why we might not want to pay over the odds for a player who may only offer improvement in a handful of games.