The daily water rating actually can withstand rain, just no long term submersion. (Source: LinusTechTips visit to Oneplus Factory. They actually have a rain machine to test this for 100 hours of rain exposure.)
I suspect they either didn't manage to send it in in time for an IP rating, or they wanna cut cost.
The dual camera is like the oneplus 5T. Its to help with the low light and also portrait mode.
I do wish glass back means wireless charging, but as seen from LinusTechTips visit, i think there was an issue because one of the pcb rubs against the back panel and they needed to add an insulating sticker, so on the 6T maybe?
However, as i am using the 5T as my main phone, i don't see a need for the wireless charger with dash charging. Only need the hassle to have a car charger or bring your plug in charger with you, 30-45 mins in a cafe and you're good to go.
But hey, we are all wanting high specs for 2/3rds of other flagship prices, which is not easy to do.
Sent from OnePlus 5Teh using GAGT