I reckon they should spend a great deal of time on it. Morrowind (I'm not sure how long it was in production) had an amazing range of content, and it all fit together perfectly and immersively. Oblivion however, while still having a great range of choice, lacked the amount of content and magnitude of content of Morrowind. If you know what I mean : /
Apart from that although I'm sure these have been mentioned before...
More lifelike AI, I mean the way the behave. Also more variety between npc's, aesthetically and personality wise. Basically every character of a race looked the same... Not being racist of course, that's just really how I see it
More variety in combat. More ways to swing your weapon, more spells, more ways to cast spells, more ways to assassinate people, more ways to solve problems in the game (even though there is a deal of variety already).
As aforementioned, more quests, more kinds of quests, unique quests with better story. Make it more worthwhile to travel around by adding quests all around the joint.
Better mount system. Riding horses in oblivion always seemed clunky. Also to add to that, more kinds of mounts.
Better diplomacy system. Give persuasion more variety than that lame minigame (although khajit expressions in that were fucking hilarious)
Weapon and armour crafting system could be really well implemented... As long as they don't put in a thousand ghey crafting quests that will make you grind for hours. If they did it well, it could be really fun. In contribution to this, the environment could be entirely harvest-able.
More sets of armour
More spells. MOOOAAAAAR spells
Maybe a house building system? At least customization. This could add to the crafting system. Would be nice to be able to buy out land aswell.
More guilds, MOOOOAAAAAAAAAAR guilds, longer guild questlines that still stay fresh. Thieves guild was a bit of a drag with all the fencing.
Apart from that although I'm sure these have been mentioned before...
More lifelike AI, I mean the way the behave. Also more variety between npc's, aesthetically and personality wise. Basically every character of a race looked the same... Not being racist of course, that's just really how I see it
More variety in combat. More ways to swing your weapon, more spells, more ways to cast spells, more ways to assassinate people, more ways to solve problems in the game (even though there is a deal of variety already).
As aforementioned, more quests, more kinds of quests, unique quests with better story. Make it more worthwhile to travel around by adding quests all around the joint.
Better mount system. Riding horses in oblivion always seemed clunky. Also to add to that, more kinds of mounts.
Better diplomacy system. Give persuasion more variety than that lame minigame (although khajit expressions in that were fucking hilarious)
Weapon and armour crafting system could be really well implemented... As long as they don't put in a thousand ghey crafting quests that will make you grind for hours. If they did it well, it could be really fun. In contribution to this, the environment could be entirely harvest-able.
More sets of armour
More spells. MOOOAAAAAR spells
Maybe a house building system? At least customization. This could add to the crafting system. Would be nice to be able to buy out land aswell.
More guilds, MOOOOAAAAAAAAAAR guilds, longer guild questlines that still stay fresh. Thieves guild was a bit of a drag with all the fencing.