The PR for sure doesn't worth 1 euro. I've keeped the max lvl for more than 1 season (lvl 10 changed in lvl 5) but I didn't see any difference when I fired him. The other specialists imho are quite useless too but as I don't want to see a black cat in front of my car I prefer to not have a lvl 1 as doc even if I keeped one for some weeks in the past

1990-2022 Stalinorgel - https://www.youtube.com/watch?v=pV-Xppl6h8Et