In going through the redis data on a single instance server I found that none of the character data is stored there. Must be redis is used mainly for transferring between servers but guess the source of truth for the data is on each server in the grid. I didn't get a chance to take a look at a multi-server/grid instance but would expect to see the same there. Changing the data I did find in redis had mixed results. I changed my character name and that would not show up in game but changing tribe name did. So good chance that changing things there wouldn't have a good result anyway.
Makes sense and I figured it was a long shot as even being able to figure out what to change things to would require a lot of trial and error.
Best workaround we can think of would be to recreate your characters and have admin intervention to set xp and adjust companies if needed. New characters seem to be fine.
Otherwise wipe.