Right, lets go through this list:
Spears - Cool.
Kill cams for magic - Should be a patch, not content you have to pay for.
Water arrows - Cool!
Giant mud crabs - This, amongst other things, could just be the "more enemies", but I wouldn't buy something that would just give you big-ass mud crabs. This could be modded easily.
Paralysis runes - Alright.
Seasonal foliage - Awesome.
Speedy water currents - eehhh....I don't know what this is supposed to be. but "ok". Moddable, too.
Dark dungeons - New dungeons in general are an awesome idea.
Adoption of children - Moddable. But why only adoption and not just creating one yourself through your wife. Jeesh.
Advanced home building - Awesome. Great idea.
Epic new mounts - Flying, maybe? Or is that just hax.
Fast travel portals - Why is this useful? Explain to me. I love the options it gives you now, it's more than enough. That said, it's still extra content, so sure.
Kinect dragon shouts - Cool idea. I hope Kinect can handle such a thing.
Enhanced water visuals - Moddable. In fact, it's already been done about a billion times.
Ice and fire arrows - Great, just like the water arrows. I think there should be this branche where equipping magic in one hand and a bow in another hand is an option, lowering base damage, adding an effect. Just a random brainfart.
Lycanthrope perk tree - Yes. Just yes.
Vampire imp minions - Also, great idea. I don't think this would fair well if released alone, though. It's a bit too measly for that.
Goblins - Sure. Give them some new dungeons too. I don't disagree. As long as they look good.
Spears - Cool.
Kill cams for magic - Should be a patch, not content you have to pay for.
Water arrows - Cool!
Giant mud crabs - This, amongst other things, could just be the "more enemies", but I wouldn't buy something that would just give you big-ass mud crabs. This could be modded easily.
Paralysis runes - Alright.
Seasonal foliage - Awesome.
Speedy water currents - eehhh....I don't know what this is supposed to be. but "ok". Moddable, too.
Dark dungeons - New dungeons in general are an awesome idea.
Adoption of children - Moddable. But why only adoption and not just creating one yourself through your wife. Jeesh.
Advanced home building - Awesome. Great idea.
Epic new mounts - Flying, maybe? Or is that just hax.
Fast travel portals - Why is this useful? Explain to me. I love the options it gives you now, it's more than enough. That said, it's still extra content, so sure.
Kinect dragon shouts - Cool idea. I hope Kinect can handle such a thing.
Enhanced water visuals - Moddable. In fact, it's already been done about a billion times.
Ice and fire arrows - Great, just like the water arrows. I think there should be this branche where equipping magic in one hand and a bow in another hand is an option, lowering base damage, adding an effect. Just a random brainfart.
Lycanthrope perk tree - Yes. Just yes.
Vampire imp minions - Also, great idea. I don't think this would fair well if released alone, though. It's a bit too measly for that.
Goblins - Sure. Give them some new dungeons too. I don't disagree. As long as they look good.