There's nothing wrong with those strategies per se, it's how they are implemented that will determine how successful they are.
There's a danger of trying to do too much too fast in terms of the recruitment side of things. You guys already had the best academy in the country, and the conveyer belt of players coming through was really just starting to bear fruit. I think perhaps an evolution rather than a revolution would be better, rather than signing multiple 18-21 year olds from external clubs almost squashing the work you've already done. Then of course these players really need a path to the first team, and not be blocked consistently by big fee first team signings constantly.
As for having a network of clubs, again that's good in theory. But to really make it worthwhile, those clubs need to be or get to a decent level in those leagues that give these high class youngsters a decent level to play in. Look at the City group for instance, can anyone name any player that successfully transitioned from these partner clubs into first team players? It works with the Red Bull clubs, partly because because Leipzig isn't elite level, and is still a club where players can be developed without pressure to win.
In the elite clubs like City and Chelsea, only the best youngsters make it through, and most of the time the best youngsters are too good for the likes of Girona and Lommel already. I seen Bluelion mention a strategy with players like Endrick, but how do you convince someone like Endrick who is already starting at a big club like Palmeiras, to sign for you and spend a couple of years on loan an at a lesser Brazilian club?