Venus has some things going for it, like a relatively earth-like gravity of 8,87 m/s² (about 90% of earths) , an atmosphere blocking radiation and being relatively close to earth . The proposed colony would float in a part of the atmosphere that is less hot and dense than the surface. It still wouldn’t be very useful, you can’t utilise the resources on the surface. And it would be obviously very risky.
The Remaster Champion is in Player Core 2, which is listed as available on their website, but hasn’t been updated on Archive of Nethys. I don’t have the book myself, but according to a blogpost (https://paizo.com/community/blog/v5748dyo6uib0?Player-Core-2-Preview-The-Champion-Remastered) about it they said they still have causes, they are just not bound to alignment anymore.