Did something change with the difficulty levels when Legendary was introduced. I mean yes something changed, we got a new difficulty level. However I picked up skyrim again about a week ago. I started my character off and things seemed ok, I noticed I was killing the bad guys (i was level 5) pretty easy, so I thought I would up the difficulty. Shock horror it was already set on expert. Previously I'd found expert pretty tough on very low level characters. So it is just me or did something shift.
No shift, you are probably in a honeymoon period where coming back to an old habit seems a bit easier. I have always played on Master, so I got so used to it. The difficulty "remained" as far as damage in and damage out, but I can anticipate enemy movements making what seemed to be a difficult way of playing now seem easy.
I have expressed a similar frustration here as well. As I got better at the game, I started a new game on Expert to provide more challenge. Now, whenever I play, it seems I go through every dungeon and 1 shot every single enemy, then get to the boss, who absolutely rapes me. These difficulty spikes make the game very annoying to me. I much prefer a casual, progressive challenge.