Yeah, make Dragonborn and Tiefilings NPC only, or just leave them totally out of your games. That's probably what I'm going to do when I start running 4e.Oh really? Then rip out the Dragonborn and Tieflings! What are you waiting for? Don't let fluff stand in the way of a good game!
As for Eladrin being High Elves...heck, that's exactly how I'm explaining them! There are 3 sub-races of elf, Eladrin, Elf and Drow who have some large racial and very large cultural differences, but all three still primarily elven.