The activation filter in D-cam is a nice thing - but a little bit irritating if you have to select a number of items. It would be nice if the filter function worked in a way like display style, where you can put marks for things you want to see.
Another thing is in Ground Plan, that it would be nice to be able to turn on and of walls you want to see or not see. Both in the display and when making drawings. Because some times one makes walls, just to be able to make some items on the building.