It's not PL it's when people say New gen they say Shanks, when he is Midd gen. Let me explain.
Old Gen Roger PrimeBeard Xebec Prime Garp/Sengoku Kong Shiki Prime Rayleigh.
Midd Gen Shanks Mihawk Kaido BM Dragon Akainu Aokiji Kizaru.
New Gen Luffy Blackbeard Zoro Sabo Koby Sanji, i newer put Law & Kidd because i knew this would happen & they would fall.
New Gen not all > Old Gen again not all > Midd Gen.