The Mendy variant works great with Laporte back, he's got world class reading of the game so he can easily close those gaps that appears. I also agree about our formation, which was at it's peak with Gundogan who's got the recovery pace of a 50 year old dad.
However I can't understand why we went for Rodri over Partey. Why not trade a little bit of playmaking ability for someone who's a lot faster, more agile, better going forward and defending. Partey is no slouch on the ball either, his passing range is excellent. Partey also had a much cheaper release clause. It must have been some bias going on given that Rodri is spanish just like Pep and that Busquets is probably Pep's favourite player after Messi. Rodri is good but Partey is as close to Fern you can get
We can either fix our counter attacking problem by getting someone to rotate with Rodri, for example Laimer, Zakaria or Partey who are fast box to box midfielders with excellent defensive capabilities and good feet. Or by buying a faster CB to pair up with Laporte. Someone like Upamecano, Varane, Sule or even buying Jason Denayer back from Lyon
Ideally I would buy both Laimer and Upamecano if i were Txiki and use Angelino as leverage. Zakaria is also someone who can play both CDM and CB just like Fern, he's also faster than some wingers even