It seems Pep and Txiki are still working on the defensive part of our squad. Highest improvability there, relative to other parts.
Cancelo, Angelino, Rodri, Maguire.
Especially height seems to be addressed (after listening to Pep re our weaknesses)
through Rodri and now maybe Maguire, certainly one of the top PL CBs.
Pep often said he needed Fern for corners or set pieces to support our CBs with his aerial presence, even without being really tall.
Maguire isn't slow over a longer distance, remember his sprint down our right flank.
Tall players have a disadvantage over the first yards but can accelerate over distance using their long legs. Remember Yaya. Or Bolt. - Fair comparison... ;-)
You just cannot have it both. Height - or pace on the 1st yards. You have to decide.
Anatomic rules and leverage effects. Pep surely is aware.
Will Maguire be the best solution? Not sure. There are better CBs out there, but no homegrowns if that is a key factor.
Are better CBs possible as a transfer target? Not sure again. We know about problems involved with De Ligt or Koulibaly. Others like Van Dijk are not in the market.
If Pep wants to address especially height Maguire is a good solution. Young Tosin has it too, but maybe won't get to top level.
Anyway we would improve that department. In front of both ends of the pitch.
Bad news for our opponents is the fact Pep further wants to improve an already fourmidable squad. :)