Just a thought about the idea of changing the rules on Multi and Double
Classed Characters. I allow Humans to be Multi-Classed but they must adopt
the Half-elven Level Limitations. I also allow Elves & Dwarves to be Double
Classed but they do not get the benefit of the bonus Level Limitations
listed on page 23 of the DMG. This has worked nicely for a number of years
in my Campaign.