I think bushcraft cookery on the move is an interesting challenge in being lightweight but still eating well. Some freeze-dried meals aren't that bad, but taste miles better with some fresh bannock or chapatis. They'd probably taste even better with some wild greens, or meat, but these are usually beyond my skills/ time constraints.
I'm a fairly basic forager so additional flavourings rarely stretch beyond nettles or hedge garlic. I do always carry some chilli powder, dried herbs, S+P which will liven up any offering. This is especially useful when it's cold and your tastebuds aren't working too well.
Cous cous is a great food that doesn't need simmering. I pre-season mine with dried chillis, coriander etc.
Risotto is a great warm hug of a meal, but you need to have time to kill and plenty of wood. Dried posh mushrooms from Tesco make it a really tastey meal.
While I'm on the move I keep topped up (binge) on dried nuts, fruit and seed mix.
On the subject of the packs you mention. I've found that on UL packs the first thing to go seems to be a sound back system. I think the 500g extra weight vanishes when it's properly supported on your hips and the heavier bushcraft extras of axe, knife, saw etc. make this a worthwhile feature.