Yes I would bet just being deliberate and having a philosophy will have an impact.
Doing labwork regularly is a good tool. There are so many things that can be monitored that gives you data to supplement your self-reported feelings.
(being raw vegan can not have been fun)
I wonder why you say that. I enjoyed the food a lot, as well as the shopping and prep. I was surrounded by a large supportive raw vegan community, and it may have been one of the most social times of my life. It was literally fun and I would have continued if not for the health issues. And yes, some cravings. It was culturally easy for me in a way that carnivory isn't, yet here I am.
That brain fog issue sounds like you were missing something, did you test yourself? I am sure if you miss your old diet you can still do it with some additions. As mentioned in the article B12 is important.