Oh boy, a guy who betrays me in combat, is obnoxious, and overrides the outcome of the main characters decisions even if they both agree. That sounds like a fun guy to have in the group. I'm sure he'll last long in anyone's party, and won't be murdered in the wilderness and left to rot at the first opportunity.
I actually like the idea that not all henchmen are good-shoes that take 500 gold as pay for a lifetime of service and simply watch you run around with tens of thousands in cash, heaps of diamonds, potions of intelligence and so on. So some of them might try to murder you at the end of a tough fight for example, when you're not doing very well. But perhaps some companions now will contain stories such as this.
