Alright... Hard resetting my Icon now, hopefully "Hey Cortana" works after this...
I noticed that the default camera app was taking pictures in 1920x1080 instead of 16MP, not entirely sure what happened here, but hopefully the hard reset fixes that too.
Also, last night the messaging app crashed and kinda locked up the phone. The touchscreen was unresponsive for about 30 minutes and I had to soft reset the phone several times in order to restore functionality. (Hopefully the hard reset fixes this too...)
There were a bunch of updates to many of the apps this morning, so the fix for this issue may already be out, not sure on this one.
Not sure if anyone else can confirm this, but when rotating the phone to landscape mode in either direction, the screen flickers as though it is trying to rotate back to portrait. (Hard reset please save me :/ )
Bugs aside, this build is very snappy and is a pleasure to use.