"... a selfie-shooting camera ..."
The basic universal problem with all smart phone cameras the quality of the lens. There's a very good reason why an even moderate quality SLR lens has ten or more elements and is quite large (massive by smart phone standards). You just can't do it in a few millimetres on each axis.
It's worthy of note that those huge iphone landscape adverts on the London tube posters are described as something like "enhanced for reproduction" in tiny print on one corner. But I suppose the quality expectations of a "selfie" are not that high.