Thank you for sharing your experiences with this! I tried intermittent fasting for a couple of weeks in 2017. This was also after having read the obesity code.
I feel like my experience with the results is somewhat similar to yours. Especially during the beginning I didnt find it that hard to skip breakfast. Only sometimes I ran into issues with late night training → late night snacking/“recovery meal” → keeping 16 hours fasting window afterwards, well into the afternoon.
Like you, I also noticed that I don’t have much issue eating all the Calories in 8 hours. After working out, I would regularly be able eat a 1200-1500 Cal. lunch.
Now I’m back to splitting those between breakfast und lunch and actually doing somewhat better with hunger management, and especially regarding performance on the bike. What I still took away from the Obesitiy Code were the general insights into insulin (resistance). I try to not eat anything after 8 pm and before breakfast and also limit snacks between meals. Together with generally high diet quality this enables me to keep a deficit. I adjust this as necessary, i.e. big lunch planned at the office equals light breakfast.
Regarding the findings by Dr. Fung or the “carbohydrate-insulin model” in general: There is some controversy around it, like with all things nutrition…
Stephane Guyenet (who is the author of a very interesting nutrition book himself: The hungry brain. Strongly recommended, also looks at underlying factors like palatabilty of food and societal factors that make people overeat) wrote this article: Why the carbohydrate-insulin model of obesity is probably wrong - which does not reference Dr. Fung directly but debates a lot of the reasoning he uses in his book, like the harmful effects of carbohydrates in general and the Glycemic Index/Load.