I have been a user of the community edition for several years and recently switched to the pro edition.
First, I would like to thank you a lot for releasing the open-source Community Edition, it is great to a have such a great Cad Software in all the major Linux distros.
I think it would be really great if it was possible to change the dimensions of an object in the same way as in Inkscape : the dimensions of the bounding box of an object are displayed in the upper side of the window and can be edited, to scale it.
I think that, most of the time, we now the desired dimensions of the object, not the scaling factor. It is a bit annoying to have to calculate this factor everytime we want to scale something.
I am sorry if my english is not very good : I am french.
Off topic : Here are some examples of what I use Qcad for :