Thanks for sharing your thoughts about LibrePCB.
Regarding your questions:
I’m not sure what you mean exactly with copper pours - AFAIK this is just a different name for planes, or what would you expect to be different?
Not yet.
You can change the layer with the shortcuts ‘1’ and ‘7’ (will be changed in the next release).
Nope.
No, pads cannot be imported. Do you have an example how this works in other EDA tools?
No.
Text elements can be moved, modified and deleted each separately. But other elements (e.g. polygons) not.
No.
Unfortunately it’s really not easy to define a reasonable color set for all the dozens of layers…
Yeah I already had this idea as well. But I for routing mode and grid spacing I think it’s not needed anymore because in the next release these can easily be changed with keyboard shortcuts (with unique shortcuts for all routing modes, so no cycling through the modes is needed anymore).
Where is the preview missing? At least almost everywhere there should already be a preview shown…
Already implemented for the next release, see Hotkeys, anyone? - #16 by ubruhin