I think Zidane can be an experience option for PSG but still, they have to try holding the players in the team after they started working with Zidane, right now due to the bad performance and bad situation in PSG many players are about to leave team, so even if they hire Zidane and they can't keep players they won't have any better situation in next season.
Both are still very much needed if PSG really wants the PSG team to be better. Because with an experienced coach and also highly talented players in a team, of course the PSG team will be better than now so there will be better potential in taking advantage of opportunities to win in different competitions in the coming seasons. So this is a task that PSG management must immediately think about for a better future for the team.