Anyways, I've been going back and forth between the 6+ and the Nexus 6 I'm still using my Nexus 4 also but it's been nothing but trouble with that phone for two years. It turns off half the time in my pocket or turns on (even though I have a pattern unlock) until I feel the heat in my pocket and turn it off. That kind of makes me cautious about the Nexus 6 and why I skipped the Nexus 5.
I wouldn't be too quick to judge the N6. Sure the N4, N5 had some severe hardware deficiencies, but the N6 is not a budget device like the N4, N5 were.
Only thing I would look out for is the radio in the phone, which is Nexus weakness.