Sure City has a balanced squad, but their tranfer policy has been focused very much on younger players, who, over the years, have become older. Yet there's still a lot of players in the mid 20s, and thats probably why they are the best team in Europe right now.. You don'y buy them aged 25, you buy them aged 21-23 and two years on they peak.
So you dont see Dortmund compete for everything next season if they manage to hold on to all their current players?
City has been able to implement that because they have by far the biggest budget in Europe. They don't have budgetary constraints like Juventus do and they're like one of the top destinations for every top flavour of the month young player.
Even when City made those investments on young-ish players a few years ago, they were still winning because the spine of their team was still intact and comprised of their experienced players. David Silva, Aguero, Kompany etc were still among their best performing players.
In the end, it was an easy transition for them. It also helped that they were coached very well too.
They don't really follow a full blown youth model is my point. They will still go after the best players on the market whether young or old.
As for Dortmund, no, I genuinely don't, sorry.
Last thing I want is some sort of half assed youth project at Juventus that could sink us even further.