bigjpres: 3) I think level scaling in DF works differently, but someone can correct me if I'm wrong. In DF, the individual enemies don't scale (rats don't become level 50 rats), but instead the game just picks harder monsters and puts them in a dungeon with you. My first time playing Oblivion, I accidentally went into a main quest dungeon immediately after the starting dungeon, and killed some lich and obtained some kind of poowerful artifact orb thing (IIRC). I was like level 3 or something? It felt really weird to kill that lich. I looked it up online and found out I had an end game item already for some end game quest. My point is that it feels weird for an end game boss to be scaled down to level 3. It should have a floor, like level 20 or something. And low level enemies should have a ceiling. These kind of scaling floors and ceilings either did't exist in Oblivion or they're too wide of a range.
Actually, enemy scaling, in both Arena and Daggerfall, works differently depending on whether the enemy is a humanoid or a monster. (Note that, at least in Arena, creatures like Goblins and Orcs are treated as monsters for this purpose.)
* Humanoids get more powerful with your level. You will still, for example, fight Nightblades whether your level is low or high, but those Nightblades will be more powerful and more dangerous if your level is higher.
* Monsters, on the other hand, work as you describe; at higher levels, you fight stronger monsters, but the stats of any given monster type don't change.
By the way, Morrowind actually does have level scaling for monsters (not humanoids) that works the way it does in Arena/Daggerfall; you'll only encounter a Golden Saint, for example, if your level is high enough or if was placed there by the developers (and therefore is a one-time non-random encounter).