Easy Oblivion missions? As opposed to the oh-so-complex two stage Morrowind quests?
1. get quest.
2. complete quest without moving more than 500 feet.
If you're talking about what I think you are, missions like Ajira's report hunting, those are relatively few and usually taken on in lower ranks. Most missions require you to travel quite a ways, many even making you go to other cities or out into the ashlands. When you compare that with each FG mission in Oblivion, most of those require you only to leave town to some little cavern just outside city limits, and even the ones that don't, there is rarely any actual searching for your target because of the almighty GPS Compass.
In Morrowind, I had a couple times where I actually got lost, and being a warrior without Recall, Levitation or Almsivi/Divine Intervention stuff, I was
really lost. I couldn't just fast travel back to the nearest town, get my bearings and give it another whack. After playing only a minute amount of Daggerfall the other day, though, I see that Morrowind too was a step backwards, so I can't really fault Oblivion. Oblivion was fun, pretty, and I played through at least five characters and over a thousand hours total between them. I ain't bashing TES4, I just think that if they start back towards the experiences found in previous games, they'll be doing better by the fans than continuing to remove the challenging aspects in favor of making it all prettier.