I don't know how to answer your question because I don't know what you understand by full potential but no the job isn't a poisoned chalice. First people need to seriously remember that high press and full field press isn't a magical recipe for success and isn't something that you have to do in Football, this idea is getting tiresome because we are turning Football conversation into genuinely stupid arguments, secondly people need to stop imagining things when it comes to players actual profiles.
I quickly mentioned it with
@Oly Francis and I'm sure that
@Sayros spotted it too. Some of the solutions for Pochettino have already been found by Tuchel two years ago, you have the option of playing in 3412/343 or a 4222 but unlike two years ago they have the CMs/DMs for that and shouldn't have to use Marquinhos in midfield though it wouldn't be a bad idea to try it since he is a better passer than most while also being more disruptive in midfield. They should use a low block and mainly rely on fast breaks because their midfield isn't built for possession.
Now there is third option that is based on Riquelme's profile at Villarreal. PSG could play in 4231/4312 with Messi playing the Riquelme role, you put Verratti and Marquinhos in midfield, Neymar and Di Maria on the wings and Mbappé ready to run or you use Wijnaldum-Verrati-Gueye in the flat midfield three. You don't use a high press, but a short time press and retreat, similar to what many teams do.
There are many options that are balanced and take into account the profile of the players they have, the issue is when managers have blinkers and can only see what they want to see. It's one of the reasons I really like Tuchel, he is willing to try everything, he sees a problem and tries to fix it.