We eat pretty much an Eatwell Plate type diet , with carbohydrate breakfasts. Our portion sizes are in line with guidelines (e.g. 70g meat, not e.g. a whole chicken breast per person). Yes, we eat some sweet stuff - no puddings at any meal, but a biscuit or cake for tea.
We are all fine, weight wise, and energy wise.
Yes, i can see that if you eat 2 or 3x the recommended amount of meat in a meal, then you shouldn't also eat the recommended amount of carbs - because the meat will already have given you more than enough calories - and not eating the carbs will help you to lose weight because you're not eating as many calories. On the other hand, if we eat normal portions of meat, then there are plenty of calories left over to 'spend' on a standard portion of carbs as well...
I find restaurant etc meals very hard to eat, both because of the portion sizes and the 'richness' of much of the food - additional cream, sugar, fat, sauces.
I genuinely don't think that the BALANCE of the Eatwell plate is a problem. It is the size of the plate onto which people heap their portions that is the problem.