CICO is still the king of weight loss. Like I did Keto and lost a bunch of weight, but I was also calorie counting too. There isn't really settled science around whole insulin resistance...I've seen some people like Jason Phung swear it's the most important thing ever and others say it's not...
my priority is upping my protein intake and fibre and greens and cutting out fast foods generally. Fortunately I like to cook so not too difficult as long as I'm organized.