Right now both list and tools revision history looks somewhat like this:
while the audit history looks like this:
You will notice that the list and tools revision history has less context than the audit history (the only source of description in a revision history is the revision comment, and that alone is not sufficient source since the person providing the context can add a confusing comment). The audit history tells the story of what is happening at a glance.
This was ok in the past because the list and tools revision history views as we currently have them are in either a list or tools details view, so there is the implicit context of what tool and list the revision belongs to.
If we create a unified revision history view however, it will be very difficult to decide what tool or list a particular revision belongs too.
The tools and list revision history view needs to look less like it looks now and more like the audit history view.