Well, perhaps it's all about how you play your characters. In my own experience and gameplay, an extra feat allows my characters to get vital abilities on an earlier basis, such as cleave/great cleave, or better spell-casting etc. Also, a lot of the nonhuman races have a stat penalty which negates the stat bonus, though, admittedly, the drow are an exception. And many of the extra nonhuman race abilities are easily negated by having a human fighter, for example, instead of a drow mage with longsword capabilities. I get the impression, though, that RL ad&d gameplay probably would make far better use of the nonhuman abilities than on a PC level.