Would it be possible to add a graph showing the number of reverts vs non-reverts edits (globally)? And also a histogram of edits by size (instead of just having <20KB vs >20KB pie chart for example, this would give more granularity). The rationale is that the tool is solely based on edit counts, and very little on edit content, whereas both are important. Arguably it's more difficult to assess edit content, but with the addition of these two metrics, I think this would significantly increase the possibility to use this tool to assess content in addition to count 
Topic on Talk:XTools
If by content you mean writing articles, etc., and not maintenance work such as reverting vandalism and semi-automated edits, you could use Auto Edits. This doesn't separate reverts and non-reverts, but it does offer some visualization and exposure of content vs. non-content contributions. True revert detection is practically a science (one could perform partial reverts, etc.), and the rudimentary job Article Info and Top Edits (per-article) does at it is very much approximate and slow enough as it is. We could not feasibly do this for every edit a single user has made. Hopefully Auto Edits at least helps your use-case.
A histogram aggregating the sizes of edits is a neat idea, but I wonder how expensive it would be. I have created phab:T236087. Feel free to follow it for updates. Thanks for the fine suggestion!
Thank you very much! Yes Auto Edits fits the bill