here's the deal:
ATM it looks like a hardware issue with the ONE in low light that becomes more apparent when the sensor heats up.
some devices will have more of it, some less. but it's there on most of them, from what i read.
most people don't take pictures in extreme low light, or are using flash, so they don't bother with a bit of tint sometimes.
the ones that have a serious tint issue are more specific cases.
if you'll take a picture in almost no light situation i think you'll get a purple tint, instead of a "black" picture, with most of the ONEs out there.
but then again, both cases will be unusable anyway.
a bit of tweaking (night mode, white balance, etc) can give you better results in low light, diminishing the tint.
this is an example of extreme low light picture (not perfect of course) with NO tint, although i do have the tint issue. so this proves it depends on how you use it.
i myself never use flash, and take many pictures with available light. i do get a bit of tint sometimes, but no big deal.
it's your choice. either go and do excessive tests in the store, see if low light pictures are decent for your usage, or buy another phone.
IMO, the
wide angle,
slow motion and
very good low light capabilities are hard to beat, comparing to other phones.