EasyEDA already has a helpful dimensioning tool for point-to-point measurements. It would be great to see it be able to correctly dimension holes as well. You should be able to click on a hole or pad and have a leader come off at an angle which calls out the diameter of the hole.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
I'm looking for this feature too. Is there any proper place to vote for its implementation?