My old character Mitaki's skills were erased too, but his stats (int, strength, etc.) were still there. Made training quite annoying since I couldn't exactly kill anything high-leveled with no weapon stats, but I'd 1-shot rats and things with the high amount of strength. I never did get a chance to reset them because "we cannot verify what skills you had", which sorta pissed me off. I never did feel like leveling them again.