Quote - Ok,

One last example, for instance I want :-

10% Flowers

10% Weeds

20% Trees

I want the rest blank.

I can't do that now, as it all has to add up to 100%, to me thats not moving forwards, its taken away the ability to do the most basic functions without now messing around with multiple layers which isn't exactly fun.

In old version you could not do this also, especially "the rest blank". Try it for yourself. What would you do in old version for this? If you did 10, 10, 20 in the old version the result in reality is 25%, 25%, 50%. That is logical. Pure mathematic. If you want "rest blank", decrease density.