Once they throw badass wrestlers into a comedy angle or into a makeshift tag team they're pretty much done. They've done it with Kane and Big Show, for example, and I'll never be able to take them seriously again. I'm not a fan of Kozlov at all, but he could be used much better.
WWE need to go back to using big guys the way they used Sid Justice, Diesel and Yokozuna, as seemingly indestructable villains. Then have a typical David vs. Goliath match up, where the smaller guy goes over. It worked so many times with Brett Hart and Shawn Michaels and was really entertaining. Not to mention how cool it was watching those guys wreak havoc and destroy the jobbers.