Neymar is an extremely valuable asset to lose. Being valuable is different from being priceless. 222M euros conforms with the contract that Barca signed. PSG and Neymar are within their legal rights, though UEFA Fair Play might bite PSG.
We'll have to see what Barca can do with this 222M euros. It sounds like Countinho can and will happen, soon. Sounds good, he will help. And since Barca is at its core South American, it can never have too may Brazilians (Brazilians of national team quality). I miss that pain in the butt Dani Alves so much.
But others being discussed, like Dybala, Dembele, Verratti, Mbappe, may not be available now for any price. The Board may have to decide between buying now players who are actually available, vs. buying later larger talent when they actually become available.