thedungeondelver
Adventurer
Interesting; found the opposite. In my experience, the way to balance an over-powered race is not to arbitrarily limit it ten or twelve levels up the line. Doing so gimps high level play without any balancing effect whatsoever on low level play, which is the goal. I'd argue it's bad design if you're doing this to try to make the races equitable.
Don't take this as a slam on earlier editions; I love them dearly. But tossing racial level limits was a no-brainer for me, and a rule I haven't even vaguely missed.
It just balances well in my games. The advantages any combination of other classes with thief given to "front-loaded" races (dwarves with their abilities, elves with theirs, halflings, etc.) means that your demi-human is going to keep getting hit dice, better saves, better to-hit rolls, and all the advantages commensurate with the thief class and the abilities "on the side" given by their other classes. Imagine a backstab from an 11th level dwarven fighter/theif with an 18/75 STR! Ye-OUCH.
And didn't take it as a slam at any rate.
You say toMAYto, I say to-MAH-to.