I would totally accept some kind of a negotiation between the clubs but at this point I feel the bridge has been burned.
I would totally accept Draxler+Rabiot+150 mil for Neymar. Not a bad deal for both clubs.
If both teams put emotions and pride aside, most of the issues could easily be solved by Barcelona being a bridge ... PSG can find buyers to the expensive players they want to dispose; add these players as part of the Neymar deal; let the buyers buy from Barcelona