(...snip...)

[...] commit history available to see which thing was added when and why.

Do you have a repository for this patchset somewhere?

Preferably with concise, yet still informative commit messages for each change as it was made?

Access to that information would be great for anyone who needs to help with the maintenance on this ebuild for the purposes of splitting things off to their own self-contained patches so each use flag has its own patch.