Skyrim was lazy, REALLY lazy.
I think that the series should combine the elements from oblivion and morrowind, but do have some modern features like skyrim, but not make it borderlined autoplay.
Example, Quest markers
Quest tells you where to go, No Marker due to not knowing the place exists
Ask Around, get directions
"Go east from riverwood", Marks Riverwood, once there, it "points you to the direction"
The more specific the information, the more detailed the marker can get.
This gives the game the modern handhold, but doesn't break immersion.
I would also love to see the fatigue bar back, as well as other features like Food regains stamana, but hurts you if you eat too much.
Blacksmithing and Alchemy can be turned into a mini game which improves the quality of the craft based on how well you do.
Also I think that the next game should put more into immersion, it would be great to be able to get lost in the game.
Overall I can't say skyrim is too bad, I spent over 50 hours on Xbox and 100+ hours on PC, only bad thing is that I refuse to play it anymore now