It would be really nice to be able to access the eyedropper/color picker via the tool bar on the left or at least with a hotkey.
could you please describe what your workflow would be in this case?
i.e. you clicked on a color button in inspector and then instead of clicking on the eyedropper in the same inspector you want to reach it on the left?
for example in flash/illustrator/photoshop you can select the eye dropper tool with a hotkey. This would be useful if you import drawn images or photography and want to design from reference images.
I reccommend the chrome extension Colorzilla for this