The benefits of a high protein diet fall off when you go over 2.2g of protein per kg. So the answer to your question depends on your weight. I sometimes add a small amount of Huel Black to my Huel White shakes to get a bit more protein after workouts. I don’t like Black vanilla nor chocolate so I cannot eat them on their own and I don’t like the macros so I view it as a product that lets you up the protein content of your main shake while giving you the necessary vitamins and minerals.
To be honest the questions you’re asking are totally subjective and dependent on so many factors.
You’d be best served talking to a decent (ie qualified) PT. They’ll be able to make an assessment of your situation, what you want to achieve and talk through what you need from your diet. The money this would cost is less than you’re going to waste on unnecessary supplements etc otherwise.
I’m referring to the masses of various pills, powders, bars etc that are available now. If you don’t know what you’re doing it’s really easy to spend £100’s a month on them and there’s only a finite amount of each nutrient your body can absorb anyway. It’s really easy to get sucked into this when your first start focusing on weight training and trying to build muscle (their advertising is everywhere).
We tend to find when we are able to properly explain what Huel is and time is taken to go through the Huel ingredient list and nutrition a lot of people change their minds. Of course a wholefood balanced diet is the ideal, but that’s not the point like you said, so enter Huel.
I think a lot of ‘pro’ nutritionists are like any other particular diet based fans - if it doesn’t fit in with their own preference or what they are promoting for financial gains, then you will have trouble convincing them otherwise.