You seem to already have all the answers, so I'm not sure why you're even asking the question(s) you're asking.
Re: the bold - agreed. However, I don't know about you, but when I'm eating a hypocaloric diet, I'm interested in losing
bodyfat, not indiscriminate 'weight'. When eating in a hypercaloric diet, I'm interested in adding lean muscle tissue. The composition of said weight in either case will be dictated to a degree by macros/food choices, and IMHO (to a lesser degree), meal timing.
To address your original question - Tron is right. Carbs have the greatest impact on insulin secretion. Fat mobilization and oxidation does not occur when insulin is present in the bloodstream, therefore keeping carbs in check is a good idea for anybody interested in reducing their bodyfat.
Personally, I keep my carbs focused around my workout window. Energy taken when required. I hit my carb macro within 2-3 meals, all by 11am (note I workout at 6am). But, I don't want to bog you down with all that broscience stuff.
