Something I miss -greatly- from Morrowind is the 'DISPOSE OF CORPSE' function which the dead bodies had.
It would be enough to do the job, but after 10 years I'd expect the system to be much better. Bethesda can really learn from other games as far as stealth and assassinations are concerned like Assassin's Creed, Metal Gear Solid and Deus Ex : Human Revolution. Making a body just disappear by pressing a button seems really silly in a 2011 game, maybe back in 2001 it was somewhat innovative.
I would love to see something like this in skyrim would add a another level of complexity to stealth builds, however i don't see this happening. Hopeful for it to be in tes 6?
I'm not giving up hope yet, if they fixed the spider tingling all-knowing guards from Oblivion and added ultra realistic AI to unscripted dragons, I don't see why they wouldn't be able to fix this in Skyrim, it's a small thing compared to the improvements over Oblivion that we've seen so far.