In a nutshell.
Carbs and Fat are fuel and protein is building blocks.
Excess protein simply has to be disposed of, more work for the body and higher insulin levels.
Excess carbs will be stored, once glycogen is full it has to be converted to fat - more work for the body again and higher insulin levels.
Excess fat will also be stored, but requires minimal processing and can be readily stored by the body and does not spike insulin.
So as far as what balance to choose, up to you, pro's and cons in all directions, you have mentioned IF in the past, if you are only eating one meal a day and choose to go high carb, there is no option but to store the excess carbs as fat.
The only way to avoid that is to split your excess carb consumption into 2-4 hourly doses that are matched to your energy requirements.
The other consideration is to split your fat & protein intake away from carbohydrate intake, there is different digestive conditions that are ideal.