Spells are already useless in Skyrim [Vanilla], you end up using only the latest level spell. I never saw stock spells as useless in Oblivion, I saw them as skills. Now they are just like arrows, you are just given them to use as is... it's soulless.
That's interesting. I'm currently leveling a mage character, which is now at level 18 or so and I'm using a good range of spells from all schools and all levels, including the stock spells! I suppose it might be different depending on how you spend your perks, but if you only used the highest level spells that were available, you wouldn't be able to conserve magicka over longer fights without sinking a dozen potions or more just to stay alive! Well, that's how I've found it anyway, and I'm really enjoying the whole magic thing in Skyrim. I've found that it's far more challenging than melee approach, it's great fun! Spell creation would be nice, but with the way they've done magic in Skyrim, I can't see that it would be as useful as it was for Oblivion or Morrowind.
As far as diversity of environments goes, I'm very happy with Skyrim, probably because whilst playing Oblivion I, like
Pseron Wyrd, spent most of my time in the Jeralls and in Bruma, my favourite area of that game. But I think there's plenty enough diversity of landscape in Skyrim, as there is with Oblivion and Morrowind.
The 'hand-holding' began with Oblivion, and they've just got a little better at it with Skyrim, which is good for business as it allows for their games to appeal to a wider audience. However, it's not such a big deal for me, I just leave quests inactive (unselected) and try to ignore the compass/points-of-interest as much as I can etc. In short, I refuse to hold their hand!