Well this thread has allayed my fears.
Certainly, there are situations that can trip the camera up and it will produce a dud. However, I don't think there is a smart phone camera that wont be tripped up at some stage. You have to remember, these are tiny little sensors jammed into a smart phone behind some simple lenses. If you want proper photos, get a proper camera.
I have a lumia 1520 which I am looking to drop in favor of the HTC One M8. The 20 mp shooter on here is entirely nonsensical as far as I am concerned. You cant make use of the detail on the phone screen anyway and looking at them on the computer only serves to remind me why I don't use point and shoot level equipment for anything serious. Horrible jpeg artifacts and pictures that look like a water colour painting.
The lumia too is tripped up by bright conditions where you have to choose sky or ground (granted even SLR's struggle with this, they do not possess the dynamic range our eyes do). It also often under exposes, especially in low light where its trying keep a minimum shutter, additionally the pictures become very soft and fuzzy.
The OIS is good mind, but at the end of the day its still nothing more than a snap shot taker and from what I have seen here the HTC's is perfectly good at that. It just has a slightly different pallet of strengths and weaknesses...all you have to do is adjust your shooting style accordingly.
People really need to get on YT and watch DigitalRev's serious of pro-photographer cheap camera challenge videos. If you need any convincing that the person behind the camera determines the quality and feel of the photo and not the camera, those videos are for you. Benjamin von Wong's video is especially good.