After reading the patch notes:

[u/Leach-8]

Greebs mains rejoice

[u/somnosanct]

this was always viable, people just didn't bother doing it

[u/kidnamedsquidfart → u/somnosanct]

but they changed it so you also get 1 ghoul with no levels & 2 on t3

[u/Babyback-the-Butcher → u/[deleted]]

They definitely help tho. People underestimate how much damage those fellas do