I read a lot of scifi and have generally been impressed by the naming. I dislike Cratylic names when they're trite but authors like Phillip K. Dick and Gene Wolfe manage to pull them off. Neal Stephenson uses them humorously in Snowcrash (the protagonist's name is 'Hiro Protagonist'). I can't say I'm a fan of Asimov's names in the Foundation series - not Cratylic, just a bit off sounding. "Bayta Darrell" doesn't give the same brain-feeling as "Severian" or "Paul Atreides".