Obsidian could do more than improve their dialogue system.
They could improve the writing, lore, quests, weapon design, and-- well-- pretty much everything.
I don't think you need to aim very high to improve upon:
Will you help me with those raiders?
- Sure, I'd be happy to help.
- Yes, but when I do a job I expect to get paid.
- Absolutely, I love any opportunity to get shot full of holes. [Sarcastic]
- I'm going to need more information. Also, yes.
Ideally, even with a dialogue wheel, you'd have more than four options at a time. You could have it like DX:HR where the fourth option is just "More" and it'll show three different options. In that case, these answers should be;
1. Sure, I'd be happy to help.
2. How much am I getting paid?
3. Sorry, too dangerous.
4. I need more information before I commit.
5. Alright, I'll do it. I do so love getting shot at.
6. Aw, hell naw!
If we're sticking with the current system, then it should be
1. [Yes] Sure, I'd love to help.
2. [No] No thanks, too dangerous.
3. [Info?] I'm gonna need more information.
4. [Sarcastic Yes] Alright, I'll do it. I do so love getting shot at.