I just got an 80D, to use as a backup to a 70D, or vice versa.
When shooting interiors on sunny days all the white light coming in from the windows looks blurry and hazy.
I've had do go EV -3 or even -4 to get decent non hazy whites, but then everything is too dark, and when you edit it on Lightroom, there's noise all over the place.
Is this a known issue?
Am I missing somehting?
Yes, I agree this is all either camera settings wrong or insufficient DR. There are limits to what a DSLR can capture. You have exceeded this.
"...all shots were taken with not one but two Speedlites..."
Careful selection and critical placement of flash is mandatory. It is possible this hurt more than helped. If I were to try that shot of the bedroom, I would try to use HDR.
"...tried HDR merge in Lightroom and results weren't great,..."
Did you try handholding the camera for the HDR shot? You know HDR can not have any movement between the three shots?
Try it on a tripod.
As to grain or noise, when you do extreme adjustments in LR, you are in a sense doing the same thing as upping the ISO. Grain and/or noise will result.
I want to thank you for your input and suggestions.
After trying a lot of different stuff, I had a couple of conbversation with Canon and they were baffled too.
Camera was sent in (took the exact same shots with the exact same settings with both the 80 and the 70 and sent it in with the camera), and hopefully they'll figure it out.