Instead of all character titles ending in "the adventurer", how about depending on the most maximum skill path chosen (be it warrior, wizard or rogue) and difficulty level (possibly include permadeath as well?) each would include its own unique character title suffix.
Once upon a time it actually worked in pretty much the way you describe. It got busted somewhere along the way during the patching process and hasn't been fixed yet.
It makes one wonder exactly what broke it, and why is it difficult to fix - or is it just low priority?
Well to be fair I don't think it was ever as simple as just Wizard/Warrior/Rogue- it seemed to come up with quite clever descriptions of your current mix of skills. Perhaps it got broke when they added more levels to most of the skill trees, which made the formula a bit different?
I don't the details, but yeah pretty much what the two persons above me said. It's minor compared to some other bugs we have to fix.