Thanks for offering your perspective, that's really interesting.
You also raise an interesting challenge! Do you think that adding nuance to personas might increase the difficulty of applying them within our design work? Is the purpose of the persona to represent "typical" users' behaviour, and therefore adding nuance would be a contradiction?
I'll definitely be keeping the nuances angle in mind while I'm reading and carrying out research.
I will be working with a case-study organisation who have a set of personas they don't use, so the question of how to help them adopt and consider personas is definitely one I can start to explore.