Totally appreciate where you are coming from but I think if the opportunity presented itself we would be silly to say no. I actually quite like Navas but I would take sanchez over him without a seconds thought. Plus Gabi jesus will, I think, eventually be sharing the role of striker with Kun. Sanchez can play so many different positions and he is world class, we would be mad not to.
Having said that I cant see it happening, I think he will either sign an improved contract or go to bayern
Aguero, Iheanacho, Sané, Sterling, G. Jesus and Sanchez is too many players IMO even if we bin Navas and Nolito, and Marlos Moreno, and Patrick Roberts and Enes Unal, and Zinchenko. Not to mention future opportunities for Brahim, Sancho etc. etc.
At the moment we only have 1 nailed on starter, Aguero, which gives us quite a lot of flexibility as to the other 2 or 3 in the forward line. If Sanchez arrived we would have 2 guaranteed starters and that would mean 4 players scrapping for one other spot.
I think we'd end up losing one of the world class prospects for a 28 year old, and while it might get us a boost in the short term, might give us our very own Chelsea-Kevin De Bruyne moments later on.
If you think back to Pep's Barcelona he had 4 players for the front 3 and all were very good.
If you think back to Bayern he had more, but mainly because Ribery and Robben were always injured, and thats how he kept 6 players happy.
If we got Sanchez, someone out of Sané (£47m), Sterling (£49m) and Gabriel Jesus (£27m) would eventually become unhappy and probably leave, which would be a shame given the time and investment we'll have made in them, and the fact they're all 6-8 years younger than Sanchez.
I wouldn't object to getting him here obviously, he's a phenomenal player, but I think it would have drawbacks, the squad wouldn't be balanced.