I agree with you. But Modern Warfare was made by Infinity Ward, whereas Call of Duty: World at War, was made by Treyarch (both were produced by Activision). Even if Infinity Ward made both games, I think me and you would probably think the same, here is my theory – WaW did not show us any real gameplay of multiplayer/single player video’s, therefore when they brought out the Beta, it shocked us all because we had no idea what was in store for us all and after playing the great MW with much better graphics, gamplay and the whole way the weapons worked. WaW failed with most of those.
But because MW2 has given us preparation of what’s in store for us such as these two video’s giving an example of not just how some multiplayer will work but how fast the game will be, weapons ect – Check it out!
http://www.youtube.com/watch?v=0ZuWHwdcTRM
http://www.youtube.com/watch?v=V4PMRFkx07g
But yes, overall I think Modern Warfare 2 will completely meet what’s wanted of it!