Fallout 3 was after Oblivion, iirc, so they definitely had a chance to improve. And Fallout 3 was pretty darn good, so hopefully they'll have learned from that. Lol I feel like I should be their spokesperson, but: the differences between the races have improved, it seems. At least that's what I've gathered from screenshots. Also, Game Informer has a pic of some Companions (Fighters Guild) guy who is blind in one eye, shown well through the milky film over the eye + the scar on his face. And facial hair is customizable now, so that should add diversity. The Nords are racist in Skyrim against the elves, I believe, so yay for that. And the dungeons are supposed to be more unique now, though we shall see. Can't argue against your other points though, lol.
No item grants 100% Chameleon. You need at least 4 pieces of equipment to accomplish this as an auto-effect. Also, I'm a vampire atm. It's not worth it, imo. It's my second time playing as one, and it gets annoying. Constant feeding is a pain, especially when you forget to feed. Sun damage prevents you from fast travelling as well, so even though the damage might seem minimal, it'll take you a while to get where you're going if you're not speedy. Weakness to Fire can be overcome...just don't pick the Lord birthsign if planning this. The boost to skills is a mixed blessing; on one hand, being able to power up just by waiting a day can prove useful at lower levels. However, this means that if you ever plan on getting cured, you need to account for the drops all across the board. I'm questing for the cure atm, and I had to pump up some magic levels to stay where I was originally. And I'll be losing 5 Strength points, which is annoying given that Vampirism was what put me to 100 in the first place. The only true perk to Vampirism, imo, is the Hunter's Sight lesser power. Very useful for a non-mage. Oh, and the Acrobatics and Athletics boost, but only if those skills were already at 100.