You could even go as far as saying that Bertolacci (available for <10m) is better option long term. Paying ?50million for any player is obscene IMO, but that's just the way I play FM, buy cheap & sell big - never, ever the other way around.
I got him in my HSV save in my third season, Schalke were struggling and he only had like 16 something apps for them so I got him for around 16 million pounds which I thought was a bit expensive, but after reading what you guys have said I guess not
For me what separates Goretzka from other very good Midfielders is his aerial ability. But he will rarely come cheaply. And I rarely see him available in the first season.
I think I paid 20m+ for him in season 2 or 3. He was worth every penny. But if your starting budget is not that rich, you will likely get better bang for your buck picking up a Lucas Romero, Youri Tielemans, Roberto Pererya, or Lucas Silva instead.
Of course the best midfielder in the game is still Pogba and he is insanely expensive.