You're looking at it from the perspective of a tech enthusiast.
But I want to ask, if a normal person saw a Lumia 830 sitting on a glowing charging pad on the left, and a OnePlus One chilling on a micro-USB charge on the right, which one will this person take a look at?
This is the point Microsoft's trying to hammer with the L830. It is about premium experiences (that you'd normally find in premium handsets), e.g. solid camera, fancy accessories, eye catching design, at affordable pricing.
The people they're aiming at with the Lumia 830 aren't tech enthusiasts, but people looking at older gen iPhones at similar pricing.
Think of it as the Windows Phone equivalent to the iPhone 5C. It's essentially a mid-end phone with high-end edges frills sold for a relatively high price. If given the right push (in terms of market messaging), the L830 more than stands a chance against the iPhone 4S, 5C and 5S, especially when the latter two will be $400-450+.
Believe it or not the crowd that buys Nexus 5s or OnePlus Ones from source isn't very big. Many of the Nexus 5s you see in the wild, at least in Canada, are in fact from carriers and sold to users as though it were a $500+ phone.