Considering that up until now, each Elder Scrolls game has been different from the last, but still taken place in the same world, and still has some elements in common, I expect the same from Elder Scrolls V, so if it comes out and differs from a past game, I won't be surprised or dissappointed, in fact, I kind of hope it won't be Oblivion 2, not because I didn't like Oblivion, I did, as I did Morrowind, and Daggerfall (I've never played Arena.) Each Elder Scrolls game I've played has offered an experience that I enjoyed. But rather, it's because if Bethesda changes the mechanics, this will give them an oportunity to fix the aspects that weren't done as well as I'd have wanted, and enhance parts that were already good, in some areas where I felt past games did better, I wouldn't even object if it took a step back towards what we got in the earlier game. I want Bethesda to look back, not just at Oblivion, but at earlier Elder Scrolls games as well, and consider what they did well in each game, and what wasn't done so well, what good ideas they had, what mistakes they made, and when creating the new game, they should learn from past mistakes and try to correct them, and deliver a game that will satisfy players.
Well, lock-picking was more interactive, instead of just clicking on the box, armoured with a lock pick.
That it was, which I was fine with, what I didn't approve of, though, was the fact that it made the security skill not very important, as anyone could pick any lock, no matter what their skill was, whereas in Morrowind, you actually needed to be good at lockpicking to pick difficult locks. Aside from reducing the importance of the security skill, it also made the unlock spell rather worthless, since while you needed to have some skill in alteration to cast such a spell, no skill was needed to pick locks. Really, it would have been better if they had just done what they did with Fallout 3 and simply added a skill requirement for locks, so that you could not more difficult locks without a higher skill in security. I'm sure that the fact that the Skeleton Key, once you get it, renders any semblance of challenge lockpicking might have had completely void also didn't make people like what Bethesda did with that better.
I have to agree that I hated the persuasion system Oblivion used though, really, in this respect I have to say Morrowind's persuasion system, despite really just being a matter of bribing people with large amounts of gold until you reached a high skill level, did much better, at least that system actually made sense. Have you ever tried to get people to see things your way by telling a joke, then suddenly threatening them, then boasting about your achievements, and then flattering them in real life? I doubt it would work.