It may be, but it's still the only distinction between players who want to make interesting characters and those who make overly powerful characters that I could think of. I personally prefer to make interesting characters and I could easily see myself playing a mindbender, but I hardly play...
The abilities of the class are decent. You get a competence bonus to social skills, telepathy and you get a slave at level 15(if you can meet the skill prereq by level 5). The problem with the class is that most of it's class abilities are based on existing spell. Warlocks may benefit more than...