If you want to fix something about Victoria, just locate her vanilla files and copy the tag into DoC, then fix it. It will overwrite whatever is in vanilla.I couldn't find Victoria, presumably because she is a vanilla leader and thus doesn't have any files in DoC. I did find, fix and (I hope) pull request the Mohawk entry though. Let me know if it got through to you like it was supposed to.
Edit: oh and it's already merged.