Plus worried that the camera won't seem as solid in low light with lack of OIS.
This is a nighttime HDR+ shot with the 6P, first full frame, second a 100 crop. There is blur, but blur to do the characters dancing (which OIS will not help in any way) and the fact that the barge is moving. I have nearly the exact same picture (same time nearly the same angle) with the OIS-equipt G4 and the G4's shot looks like hot garbage compared to this (the 6 would have been a non-starter since it
really struggles in light conditions this low). It was pitch black in the outdoor amphitheater... crazy lighting, lots of movement.
The impact that the lack of OIS has on still pictures is way overblown... After taking tons of pictures with OIS and non-OIS phones, I haven't seen any difference. OIS WILL have an effect on video though.
Look, the Nexus 6 is a really good phone... I had it for over a year and really enjoyed using it. When the 6P came out, I mulled it over for weeks (the other AC ambassadors can attest to this) but in the end I bought the 6P.
The 6 was and continues to be an excellent phone, especially for the value that the current prices inject into the equation. I am not saying that the 6 is junk, nor that you shouldn't buy one if given the opportunity, but the 6P is superior in near every facet.
I am posting here as a former user (and huge fan) of the Nexus 6... If I didn't have my 6P, I would still be using the 6.