But it was more than that -- because of the racial hit dice, you were also ALWAYS behind on your skills, etc.By "softening" the blow of absent hit dice with the monster levels, the system guaranteed that you were worse at your job than any PHB species with the same number of "levels" (even before LA was incorporated.The main issue with 3.5 level adjustment is that it left you a few hit dice behind - generally not a problem with a +1 level adjustment but anything higher would create issues where you have far too few hit points for your ECL.