It takes a lot of time when using Studio Pro to make styling changes because you have to run the project after every small change if you want to see if you want to see the change.
My idea is that there would be a live update mechanism (like Calypso on CSS) that automatically updates the browser when only a styling relevant change is made. Or a button that allows only styling relevant changes that runs much quicker. This same mechanism should be useable for reports. Reports take a long time to design precisely because of the same reason.
Would love this feature and sure most others would.