[Butz]

The thing about "making people go back and level up properly" is well... if you look at the experience per level on GK, and then look at how much experience you actually get, leveling normally is ridiculous.

I'm somewhere around Lv 39-40, and it takes me about 1.8 million XP to level up. Killing one of the Lords will net me somewhere between 10,000 and 20,000 XP depending on how I kill it. So if we take it as an average 15,000 XP, I would have to kill approximately 120 lords in order to reach the next level.
If we take the assumption that on a good day, with some luck, I could take down one lord every 5 minutes (and that's really pushing it), it would still take 10 straight hours of playing just to get to the next level.

Of course, your mileage may vary, but you can see that as an example of why people decide to go the scroll route instead of leveling up "normally".

If you fixed the experience curve or created stronger monsters that gave more experience, perhaps more people would bother fighting monsters.