I added a feature to my ACS sever ( https://tomlaheyh.github.io/Census-ACS-5-data/ ) . The Table History button will pull all fields ( labels and data ) from 2010 to present, you have the choice of ACS1 or ACS5. Whenever the label text changes it becomes red. This might just be a label change, or could indicate a measure change, but you will have to look that up in the docs for that year. There is also a CSV export for the data only (what most people want), although you could cut and paste the label names if you wanted. I hope this is helpful, any feedback is appreciated.