Once your reach hero - Experience does not matter.

How about giving people skill bonuses for exploration (like you do when you gain level) instead of exps? Once you hit 51?

Something like:
Guildmaster is pleased with your exploration and spends some time showing you finer points of swordsplay.
You have learned 2% of your sword ability.

This sounds like a very cool idea to me, except if it ever was
implemented, I'd rather see the skill points spread across multiple
skills than all going into one. Most people wouldn't be too thrilled
about a 15% boost to pen or ventriloquism or a number of cabal skills
that never fail despite being at 70%.

Already heros get a bonus to learning (pretty sure of it anyway) but exploring as a hero is so much more gratifying than spamming skills. Plus it would add an extra incentive to exploring dangerous/interesting areas. I'm not sure exactly how much exp is given per point, but I would have a problem with something like 1% per 100 exp given. Hell I wouldn't have a problem if it applied to non-heroes, but I think it makes more sense and is better balanced by applying it to hero's. Anyway this is rambly, but mostly I just wanted to voice a strong "Hell Yea!" for this idea. I like it alot.