2010-01-06 04:24:06 PST
The net result of that system is pretty close to what we have now: to gain levels you are better killing creatures close to your level. Now we just have fixed gain and the needed xp for the next level grows.
Gained xp used to be level difference dependent in the past. It did, however, result in the problem that creatures could be dangerous to you but give no xp anyway. (And by then there were only few high level monsters and high level players had trouble gaining any xp at all).
Personally I'd prefer to keep the current system. It's simple and well understood by the players.
The other stats of the creatures are already randomized a bit. It would be possible to calculate a new level and xp based on the difference to the default stats. Probably it would better to change only the xp, as level makes a difference in fighting too, so it would make the effect of the randomization stronger.