Ulrich:
It would be wonderful to see the total weight of all optimized sheets.
For my project the weight of all furniture and construction elements is important. A camper doesn't allow for too much additional weight.
E.g. some plywood has up to 750 kg /m3 , in my case the lightweight Queenply is just 330 kg/m3 and there exist all variations in between
It may become quite important whether I add 80 kg or 200 kg of wood into my camper.
One thing to know:
In Germany and basically all over Europe the total weight of a car is strictly controlled and must never exceed the max. load listet in the car license documents. Above 3.5 tons you need extra driver license and driving such car is restricted or even banned in some areas. It is counted as "light truck"
In Austria and Italy they randomly control camper vans at a checkpoint somewhere on a highway and stop you until you remove stuff to below max. weight, and you easily pay a fine of 500€ or more. Many other countries follow same rule.
That's why I try to reduce as much a possible the weight of the optimized sheets.
Entering the weight as additional parameter in the sheet material page shouldn't be a huge problem, and the required math thereafter isn't rocket science.
Just another idea.