2) Hmm... that should not be possible. I've never had that issue, but I'll double check it.
3) Same as above. Very strange. I'll check it out.
Okay, I checked and yes, the issue is definitely accepting Sven's quest twice. Here's what I discovered:
- Talk to Faendal before you accept Sven's quest – no issue
- Talk to Sven and accept his quest – no issue, you get Sven's fake letter
- Talk to Faendal after you have accepted Sven's quest – no issue, you get Faendal's fake letter
- Go back to the Inn and talk to Sven and you can accept his quest a second time even though you have already accepted it once
Now let's do things differently:
- Talk to Faendal before you accept Sven's quest – no issue
- Talk to Sven and accept his quest – no issue, you get Sven's fake letter
- Talk to Sven again and accept his quest a second time – even though you already accepted it
- Try to talk to Faendal after you have accepted Sven's quest twice – you can't, he just turns towards you but says nothing and you don't get Faendal's fake letter
In both cases I can complete the quest by giving Camilla both fake letters (even if I never got Faendal's).
4) I'll see if I can't add more interactivity, but what exactly do you mean with this? More NPCs to talk to?... random objects that trigger some fun things? What are you looking for?
I mean the latter: more objects to interact with. Look at games like Skyrim - you have all sorts of things to interact with, such as items just lying around to be collected if you want, books and notes to read, various containers (barrels, wardrobes, chests, display cases, etc.) to search through... I have found very few such objects to interact with in this game.
Of course, having more NPCs to talk to would be nice as well.