Why does “changes saved by” contain user gravatar(?) image? Will slow down loading a lot, many additional img src. Many sites we have come across during the years have 1000+ revisions saved as there is no simple core UI functionality to limit revisions. Note: Some constant in wp-config is not simple.

A “notes” field would make more sense for revisions, to allow description what was changed and why, would also allow automatic changelog in later stages.